Hill, Stanisstreet, O’Sullivan and Boyes Genetic engineering of animals Genetic engineering of animals for medical research: students’ views Ruaraidh Hill, Martin Stanisstreet, Helen O’Sullivan and Edward Boyes Some students think that the use of animals for medical research is wrong; few object specifically to genetic engineering of animals for such research Each year about three million experimental procedures on living animals are performed in Britain. These experiments serve a variety of purposes: the development of medical and veterinary products; safety evaluation of agricultural, industrial and household commodities, and food additives; fundamental studies of the structure and function of organisms; education and training. Most would agree that many of these purposes, if not the methods of achieving them, are worthy. Some of the organisations that oppose the use of animals in research exploit the emotional impact of pictures of higher mammals such as monkeys, and people may have the impression that many experiments are done on cats and dogs (Masood, 1997). In reality, however, about 80 per cent of the procedures are performed on rats, mice or other small laboratory rodents (Government Statistical Service, 1997). Furthermore, there is a legal requirement to minimise the pain or distress caused by experimental procedures. NeverABSTRACT 11–18 year-old students’ views on using animals in medical research are surveyed. Over half the students thought that using naturally bred animals such as rats and mice in medical research was acceptable, provided no pain was caused; this view was more prevalent in older students. When asked whether the use of animals for medical research was against their religious beliefs, cruel or unnecessary, the responses were broadly similar for naturally bred and genetically engineered animals. Many thought the use of genetically engineered animals in research would lead to novel discoveries. This suggests that they have no greater objection to the use in medical research of genetically engineered than to naturally bred animals. theless, advances beneficial to humankind are being achieved at the expense of non-human animals. This ethical quandary is not new: animals have been used in research and education since early times. Over recent decades, however, the dilemma has assumed a higher public profile. Some groups opposed to the use of animals have become increasingly vocal, even active. Organisations that defend the use of animals in research have responded by being more willing to discuss and stand up for their viewpoint. More recently, new biotechnologies such as genetic engineering have been applied to producing animals for research purposes. Although the total number of procedures with animals in the United Kingdom has been reduced over the last 20 years, the number of those involving animals with genetic defects, or animals that have been genetically manipulated, has risen in recent years. In 1996, some 300 000 procedures (11 per cent of the total) involved genetically manipulated animals (Government Statistical Service, 1997). Some of the animals produced by these techniques can appear as unnatural, perhaps even grotesque. For example, laboratory mice may be genetically engineered to become obese (Lowell et al., 1993; Zhang et al., 1994), hairless and ‘wrinkled’ (Jones et al., 1993), or even to contain genes for luminescent proteins (Ikawa et al., 1995). While serving useful research purposes, these might give the impression that genetic engineering inevitably results in the production of bizarre animals, and thus increase opposition to animal experimentation, or indeed to biotechnology in general. Alternatively, those who think that animal experimentation is justified might feel that genetic engineering of animals for research is no worse than procedures already performed. School Science Review, June 1999, 80(293) 23 Public opinion, informed or not, is one of the factors that may influence the future application of genetic technologies and perhaps even legislation (ACOST, 1990; ‘Opinion’, 1997). It is important, therefore, to have some appreciation of the views of the public in this area. The aim of this study was to explore the attitudes of young people, the next generation of voters, to the use of genetically engineered animals in medical research. In order to gain insight into the possible development of their ideas, students in four age groups were studied. Method Percentage Eight community comprehensive, non-religious, mixed-sex schools and twelve further education colleges in north-west England took part in the study. A closed-form ‘questionnaire’ was used, consisting of a series of statements and questions about the use of animals in medical research (see box, page 30). It was decided to specify the type of research because students draw a mental balance between the acceptability of procedures and the purposes for which they are undertaken (Stanisstreet et al., 1993a, b); medical research is seen as a relatively worthy purpose (Foster et al., 1994). The questionnaire started with a short introductory paragraph that included a simple expansion of the term genetic engineering (‘changing plants and animals by altering their genes’). In the headings to the sections and in the individual statements, animals were distinguished as being naturally bred (‘ordinary’) or produced by genetic engineering. The term ‘animals’ was further defined as ‘like rats and mice’ to guide students’ thinking towards animals that are associated with experimentation. Students were asked to indicate their responses by ticking boxes. The coversheet of the questionnaire assured students that it was anonymous and ‘not a test’. The response procedure was explained, and exemplified 100 How much do you know? 80 60 nothing at all a little 40 using information about a popular television programme. Students were asked to record their gender. In order to encourage students to take the questionnaire seriously, it was administered during normal timetable periods and under the supervision of a member of teaching staff who knew the students. The questionnaire was piloted with 155 11–16-year-olds, and found to be satisfactory in that pupils found no difficulty in completing it. Results and discussion 778 students completed the questionnaires: 47% were females; 15% were in English National Curriculum year 7 (age 11–12 years); 18% were in year 9 (age 13– 14 years); 18% were in year 11 (age 15–16 years); and 49% were from colleges of further education (age 16–18 years). For statistical analysis of all items other than the last two, the ‘strongly agree’ responses were pooled with the ‘agree’ responses, and the ‘disagree’ responses were combined with the ‘strongly disagree’ responses. In the discussion below, when a single percentage is given it is the overall percentage of students who affirmed (strongly or otherwise) the statement. Where there was a clear, statistically significant difference between the responses of students in different year groups (p < 0.01, Chi-square test) and a trend, separate percentages are given for students in years 7, 9, 11 and the college students. Perceived knowledge and feelings about genetic engineering (Figure 1) There was a tendency for more of the older students to think that they knew ‘a lot’ or at least ‘something’ about genetic engineering (item 19: 25%, 29%, 32%, 43%). In contrast, there was no trend in how concerned students of different ages were about genetic engineering (item 18), with 30% being ‘not at all worried’, 57% ‘a bit worried’ and 12% ‘very worried’. 100 How do you feel? not at all worried 80 60 a bit worried 40 20 0 Hill, Stanisstreet, O’Sullivan and Boyes Percentage Genetic engineering of animals something 11/12 13/14 a lot 15/16 16/18 Age group 20 0 very worried 11/12 Figure 1 Students’ views about genetic engineering in general (n = 778). 24 School Science Review, June 1999, 80(293) 13/14 15/16 16/18 Age group Hill, Stanisstreet, O’Sullivan and Boyes Genetic engineering of animals Ordinary animals Genetically engineered animals 100 strongly disagree 80 disagree 60 80 strongly disagree disagree 60 40 neither agree nor disagree 20 agree 20 agree 15/16 16/18 strongly agree Against religious beliefs strongly disagree 80 disagree 60 neither agree nor disagree 100 11/12 13/14 15/16 16/18 Cruel 80 neither agree nor disagree 60 40 0 100 13/14 Unnecessary 80 disagree 60 40 neither agree nor disagree 20 0 agree strongly agree 11/12 13/14 15/16 16/18 Age group strongly disagree disagree 60 neither agree nor disagree 100 11/12 13/14 15/16 16/18 Cruel 60 0 100 agree strongly agree strongly disagree disagree 80 neither agree nor disagree agree 20 15/16 16/18 strongly disagree Against religious beliefs 40 strongly agree 11/12 15/16 16/18 80 0 agree 20 13/14 20 agree strongly agree strongly disagree disagree 100 strongly agree 11/12 40 Percentage 0 0 Percentage 13/14 Percentage 100 11/12 20 Percentage Wrong to produce neither agree nor disagree 40 Percentage 100 40 0 Percentage Wrong to use Percentage objectionable than such research in general. The responses to these two items, asking whether experimentation with ‘ordinary’ animals was wrong and whether the production of animals for medical research by genetic engineering was wrong, were then compared. This showed that 8% of the students accepted experimentation with ordinary animals but objected to the production of animals by genetic engineering. There was an indication that this combination of views increased with age. Percentage Use of animals in medical research (Figure 2) Overall, about two-fifths of the students (42%) thought that using animals for medical research was wrong, although this proportion was lower in the older students, especially the college students (item 3: 58%, 53%, 52%, 29%). A similar proportion (42%) thought that it was wrong to produce animals by genetic engineering for medical research (item 9), suggesting that students may not find the process of genetic engineering of animals for research any more or less strongly agree 11/12 13/14 15/16 16/18 Unnecessary strongly disagree 80 disagree 60 40 neither agree nor disagree 20 agree 0 strongly agree 11/12 13/14 15/16 16/18 Age group Figure 2 Views about the use of ‘ordinary’ and genetically engineered animals in medical research (n = 778). School Science Review, June 1999, 80(293) 25 Significance of pain (Figure 3) One of the major reasons for objections to research using animal experimentation is likely to be that it is thought to cause pain or distress to the animals. About half of the students overall (55%), but more of the older students (34%, 40%, 45%, 70%), thought that using ‘ordinary’ animals for medical research was acceptable provided the animals are not caused pain (item 1). Far fewer (13%) thought that such research was acceptable 26 School Science Review, June 1999, 80(293) Percentage Ordinary animals 100 All right if no pain strongly disagree disagree neither agree nor disagree 80 60 40 agree 20 0 Percentage Overall, about a quarter of the students (23%) claimed a religious basis for their views about the use of ordinary animals, although the proportion who professed a religious foundation to their objections to experimentation with these animals declined with age (item 5: 36%, 22%, 28%, 19%). Whether this is due to a reduction in religiosity or a change in the application of religious views is not clear. A similar percentage overall (21%) claimed a religious reason for their objections to the production of animals by genetic engineering for research (item 11), although there was no clear trend, increase or decrease, across the age groups. Cross-tabulation of responses to these two items showed that very few students (3%) had religious objections to genetic engineering of animals without also having objections to experimentation in general. More students, about half, thought that experimentation using ordinary animals for medical research was ‘cruel’ (52%), although fewer older students affirmed this idea (item 6: 62%, 59%, 56%, 45%). These figures suggest that at least some students, especially in the oldest group, think that procedures can be ‘cruel’ without being wrong. A similar proportion (47%) viewed production of animals by genetic engineering as cruel, although here too the percentage with this view declined in older students (item 14: 58%, 52%, 50%, 41%). Only 4% of the students thought that production of genetically engineered animals was cruel but that experimentation on ordinary animals was not. A similar proportion (3%) even thought the reverse, that ordinary animal experimentation was cruel whereas genetic engineering was not. About two-fifths of the students (39%), although fewer of the college students (54%, 52%, 50%, 26%), thought that medical research with ordinary animals was unnecessary (item 2). A similar proportion (38%), and again fewer older students (53%, 43%, 42%, 31%), thought that there was no need to produce genetically engineered animals for medical research (item 15). Some 8% of the students thought that while ordinary animal experimentation was necessary, genetic engineering of animals for medical research was not. Hill, Stanisstreet, O’Sullivan and Boyes 100 strongly agree 11/12 13/14 15/16 16/18 All right even if in pain 80 strongly disagree 60 disagree 40 20 0 11/12 13/14 15/16 16/18 Genetically engineered animals In constant pain 100 Percentage Genetic engineering of animals 80 neither agree nor disagree agree strongly agree strongly disagree disagree 60 neither agree nor disagree 40 20 0 11/12 13/14 15/16 16/18 Age group agree strongly agree Figure 3 Students’ views about pain caused to ‘ordinary’ and genetically engineered animals in medical research (n = 778). even if the animals were caused pain (item 4). A fifth of the students (19%) thought that genetically engineered animals would be in constant pain, although this applied less to the college students (item 17: 28%, 24%, 26%, 12%). This raises the possibility that some students might be basing their objections to genetic engineering on the notion that genetically engineered laboratory animals would suffer continuously. Possible dangers and benefits of the use of genetically engineered animals (Figure 4) Some of the questionnaire items about genetically engineered animals did not have equivalent items about ‘ordinary’ animals; these items explored the ethics and possible dangers and benefits of using genetically 80 neither agree nor disagree 60 40 Percentage 100 13/14 80 disagree 60 neither agree nor disagree 40 20 Percentage 0 100 11/12 13/14 15/16 16/18 Cheaper research 60 neither agree nor disagree 40 20 agree 11/12 13/14 15/16 16/18 strongly agree Age group disagree 60 neither agree nor disagree agree 100 strongly agree 11/12 13/14 15/16 16/18 Lead to human engineering 80 agree 20 0 100 11/12 13/14 15/16 16/18 Enable novel findings 80 strongly agree strongly disagree disagree neither agree nor disagree 60 40 agree 20 0 strongly disagree disagree neither agree nor disagree 60 40 agree strongly agree strongly disagree disagree 80 0 strongly disagree strongly disagree 80 0 15/16 16/18 Environmental risk No right to produce 20 strongly agree 11/12 100 40 agree 20 0 strongly disagree disagree Percentage Unnatural to produce Percentage 100 Genetic engineering of animals Percentage Percentage Hill, Stanisstreet, O’Sullivan and Boyes strongly agree 11/12 13/14 15/16 16/18 Age group Figure 4 Students’ views about the possible dangers and benefits of using genetically engineered animals in medical research (n = 778). engineered animals. Just over half of the students (53%) thought that production of animals by genetic engineering was unnatural (item 10), although slightly fewer, under half (45%), thought that humans did not have the right to produce animals by genetic engineering for medical research (item 7). Only a fifth of the students (22%), and fewer of the older students (41%, 25%, 24%, 14%) thought that genetic engineering of animals for medical research would pose an environmental risk (item 13). More (44%), however, thought that genetic engineering of animals for research might lead to genetic engineering of humans (item 16). In contrast, some students saw advantages in the use of genetically engineered animals for this type of research. A quarter (23%) thought that research could be conducted more cheaply using such animals (item 8). More (49%) thought that such procedures could lead to discoveries that could not be made in any other way, and this view increased in the older students (item 12: 39%, 39%, 46%, 57%). Differences in the responses of male and female students The responses of male and female students were compared using Chi-square analysis; these are reported below where there was clear statistical difference (p < 0.01). Unless otherwise stated the first figure is the combined percentage of females giving ‘strongly agree’ and ‘agree’ responses, followed by the combined percentage of males. There was a tendency for females to think that they knew less about genetic engineering in general (item 19): more females responded that they knew ‘a little’ (43%, 37%) or ‘nothing at all’ (28%, 20%). More females were worried about genetic engineering too (item 18), with School Science Review, June 1999, 80(293) 27 Genetic engineering of animals fewer responding that they were ‘not at all worried’ (22%, 41%), and more responding that they were ‘a bit worried’ (64%, 50%) or ‘very worried’ (15%, 10%). More of the females thought that animal experimentation (item 3: 47%, 35%) and genetic engineering of animals (item 9: 50%, 34%) for medical research were wrong, and more females ascribed religious reasons for this (30%, 16% for ‘ordinary’ animals – item 5; 25%, 16% for genetically engineered animals – item 11). More females also thought that animal research (item 6: 59%, 44%) and genetic engineering for research (item 14: 53%, 40%) were cruel, and that they were unnecessary (item 2: 45%, 32% for ‘ordinary’ animals; item 15: 43%, 33% for genetically engineered animals). There was no significant difference in the distribution of responses of females and males concerning animal experimentation that did not cause pain (item 1), although fewer females found such research acceptable if it did cause pain (item 4: 7%, 20%). More females envisaged animals produced by genetic engineering to be in constant pain (item 17: 22%, 16%). More females also thought genetic engineering of animals was unnatural (item 10: 61%, 44%) and more thought that humans had no right to produce such organisms (item 7: 56%, 33%). Males and females also differed in their views about the environmental risk of genetically engineered animals. Although the same proportion of males and females affirmed that genetically engineered animals pose an environmental risk (22%), fewer females (20%) than males (35%) opposed this view (item 13). In contrast, there was no significant difference in the responses of males and females to item 16 about whether genetic engineering of animals would lead to the application of these techniques to humans. Fewer females thought that research using genetically engineered animals would be cheaper (item 8: 18%, 29%). Conclusions The aim of this study was to determine the prevalence of school and college students’ views about the use of genetically engineered animals in medical research. About two-fifths of those surveyed thought that using naturally bred animals in medical research was wrong. This proportion is somewhat lower than that found in a previous study where more than half thought it wrong (Stanisstreet et al., 1993a), although the wording used in the previous study (‘to experiment on’ rather than ‘to use’) might be considered harsher. In both the 28 School Science Review, June 1999, 80(293) Hill, Stanisstreet, O’Sullivan and Boyes present and previous studies (Millett et al., 1992; Stanisstreet et al., 1993a,b), where differences in the views of females and males were found, it was the former who were more ‘sympathetic’ and who saw fewer advantages in the use of animals for research purposes. Against this baseline of views about the use of naturally bred animals in medical research, a question arises about whether there are more objections to the use of genetically engineered animals. Very few students oppose the genetic engineering of microbes to produce medicines, although more object to the use of sheep or cows for this purpose (Lock et al., 1993). The findings of the present study suggest that a relatively small proportion of students object specifically to production of animals by genetic engineering for medical research. Such objections as there were did not appear to have a religious foundation or to be based on the notion that genetic engineering is more cruel than other animal research, although they could have been influenced by the feeling that genetic engineering for this purpose is unnecessary. Another finding, which appears to be consistent with previous studies (Stanisstreet et al., 1993a,b), is that objections to using non-human animals in medical research diminish in older students. In part, this may reflect improved knowledge of these issues on the part of older students, because an increase in knowledge about genetic engineering appears to be associated with an increased acceptance of the application of the technology (Lock et al., 1995). More of the respondents thought that medical research was acceptable provided that no pain was caused to the animal; far fewer students were willing to tolerate such research if pain was inflicted. Most medical research will be performed under licence, and the UK Animals (Scientific Procedures) Act 1986 defines an experimental procedure, for certain categories of vertebrates, as having ‘the effect of causing ... pain, suffering, distress or lasting harm’ to the animal. Thus, it is likely that little medical research could be undertaken without at least some disadvantage to the animal. One educational aim, then, might be to enable students to distinguish between pain, distress and discomfort. Furthermore, it should be emphasised that it is a legal requirement to ensure that such pain or suffering is minimised, compatible with the objectives of the procedure. About half the students thought that the production of animals by genetic engineering was ‘unnatural’, although not all of these thought it was ‘wrong’. Thus, Hill, Stanisstreet, O’Sullivan and Boyes some students see the production of unnatural organisms as acceptable, at least in this context. A proportion of the students saw positive advantages in genetic engineering of animals for medical research. Some thought it would be cheaper than research with ‘ordinary’ animals and more, about half, thought that such procedures could lead to novel discoveries, this latter view being increasingly prevalent in the older students. In general, then, genetic engineering of animals for medical research is seen as no worse than use of ‘ordinary’ animals for this purpose. Students, even younger students, do make some distinctions in this area, viewing, for example, the use of animals for medical research more sympathetically than their use for ‘pure’ scientific research and, especially, for cosmetics testing (Foster et al., 1994). There is evidence that, within the general area of genetic engineering, the extent of people’s concerns depends upon the application to which the technique is put (Frewer et al., 1997). The results of the present study suggest that medical research, perhaps because of its obvious if not immediate benefits, is one area where public opinion will not constrain the application of new genetic technologies (Frewer et al., 1995). The issues surrounding the new genetic technologies are considered important enough to feature in formal educational curricula. The English National Curriculum at key stage 4 (14–16 year-olds), and the GNVQ Science syllabus, both require students to become familiar with the basic principles of cloning, selective breeding and genetic engineering. Associated with these scientific topics may be, in the minds of students, emotive issues surrounding the manipulation of what are perceived to be ‘natural’ processes. Indeed, this may be part of a more general disillusionment with science, perhaps perceived as the creator as much as the solver of problems, and as lacking ethical neutrality. Such negative views might act as barriers to learning about even the science of new biotechnologies. It might, therefore, assist teachers who engage with the science content of genetic engineering to be aware of the likely strength and prevalence of feelings of their students in this regard, and hence to appreciate the preexisting frame of reference from which students approach the subject. Studies such as the present one may therefore be helpful in informing teachers, and allowing them, perhaps by informal discussions, to challenge prejudices that may hinder understanding of the science underpinning genetic engineering. This is not to say that students do not have the right to opinions. Rather, students will be able to bring their Genetic engineering of animals genuine and principled opinions to bear on a betterinformed understanding of the science, and so form more considered judgements about the issues surrounding our use of genetic engineering. Acknowledgements We wish to thank the teachers who allowed us access to their students, the students who completed the questionnaires, Ms R. Toal for assistance with the initial stages of the project, Ms Jill McIntosh and Ms Tina Parker who undertook the data entry, and the referees for their constructive comments. References ACOST (1990) Developments in biotechnology. London: HMSO. Foster, C., Stanisstreet, M. and Boyes, E. (1994) Children’s attitudes to the use of animals in education and research: what are their justifications and reservations? School Science Review, 76(275), 39–44. Frewer, L. J., Hedderley, D., Howard, C. and Shepherd, R. (1997) ‘Objection’ mapping in determining group and individual concerns regarding genetic engineering. Agriculture and Human Values, 14, 67–79. Frewer, L. J. and Shepherd, R. (1995) Ethical concerns and risk perceptions associated with different applications of genetic engineering: Interrelationships with the perceived need for regulation of the technology. Agriculture and Human Values, 12, 48–57. Government Statistical Service (1997) Statistics of scientific procedures on living animals, Great Britain, 1996. London: HMSO. Ikawa, M., Kominami, K., Yoshimura, Y., Tanaka, K., Nishimune, Y. and Okabe, M. (1996) Green fluorescent protein as a marker in transgenic mice. Development, Growth and Differentiation, 37, 455–459. Jones, J. M., Elder, J. T., Simin, K., Keller, S. A. and Meisler, M. H. (1993) Insertional mutation of the hairless locus on mouse chromosome 14. Mammalian Genome, 4, 639–643. Lock, R. and Miles, C. (1993) Biotechnology and genetic engineering: students’ knowledge and attitudes. Journal of Biological Education, 27, 267–272. Lock, R., Miles, C. and Hughes, S. (1995) The influence of teaching on knowledge and attitudes in biotechnology and genetic engineering contexts: implications for teaching controversial issues and the public understanding of science. School Science Review, 76(276), 47–59. Lowell, B. B., Susulic, V., Hamann, A., Lawitts, J. A., HimmsHagen, J., Boyer, B. B., Kozak, L. P., and Flier, J. S. (1993) Development of obesity in transgenic mice after genetic ablation of brown adipose tissue. Nature, 366(6457), 740–2. Masood, E. (1997) UK tightens the regime for animal research. Nature, 389(6654), 896. School Science Review, June 1999, 80(293) 29 Genetic engineering of animals Hill, Stanisstreet, O’Sullivan and Boyes Wording of the questionnaire items Genetic engineering Genetic engineering means changing plants and animals by altering their genes. Some people think that genetic engineering will be very important in the future. These statements are about using ordinary animals (like rats and mice) for medical research (to find out what makes people ill and to test medicines): 1 It is all right to use ordinary animals for medical research provided it does not cause them any pain. 2 There is no need to use ordinary animals for medical research. 3 It is wrong to use ordinary animals for medical research. 4 It is all right to use ordinary animals for medical research even if it causes them pain. 5 It is against my personal religious beliefs to use ordinary animals for medical research. 6 It is cruel to use ordinary animals for medical research. These statements are about using genetic engineering to produce animals (like rats and mice) for medical research (to find out what makes people ill and to test medicines): 7 We don’t have the right to interfere with nature and produce animals by genetic engineering for medical research. 8 Medical research can be done more cheaply with animals that have been produced by genetic engineering than with other animals. 9 It is wrong to produce animals by genetic engineering for medical research. 10 It is unnatural to produce animals by genetic engineering for medical research. 11 It is against my personal religious beliefs to produce animals by genetic engineering for medical research. 12 Producing animals by genetic engineering will allow medical researchers to find out new things which they couldn’t otherwise find out. 13 Producing animals by genetic engineering is a risk to the environment. 14 It is cruel to produce animals by genetic engineering for medical research. 15 There is no need to produce animals by genetic engineering for medical research. 16 If we allow animals to be produced by genetic engineering for medical research, this will encourage genetic engineering of humans. 17 Animals which are produced by genetic engineering for medical research will be in pain all the time. These questions are about how you feel and what you think you know about genetic engineering: 18 What do you feel about genetic engineering? 19 How much do you think you know about genetic engineering? Students were asked to respond to each item by ticking a box. The following possible responses were offered: Items 1–17 I strongly agree; I agree; I neither agree nor disagree; I disagree; I strongly disagree. Item 18 I am not worried at all about genetic engineering; I am a bit worried about genetic engineering; I am very worried about genetic engineering. Item 19 I know a lot about genetic engineering; I know something about genetic engineering; I know a little about genetic engineering; I know nothing at all about genetic engineering. Millett, K. and Lock, R. (1992) GCSE students’ attitudes towards animal use: some implications for biology/science teachers. Journal of Biological Education, 26, 204–208. Stanisstreet, M., Spofforth, N. and Williams, T. R. (1993b) Attitudes of undergraduate students to the uses of animals. Studies in Higher Education, 18, 177–196. ‘Opinion’ (1997) Referendum’s challenge to transgenic research. Nature, 389(6647), 103. Zhang, Y. Y., Proenca, R., Maffei, M., Barone, M., Leopold, L. and Freidman, J. (1994) Positional cloning of the mouse obese gene and its human analogue. Nature, 372(6505), 425–431. Stanisstreet, M., Spofforth, N. and Williams, T. R. (1993a) Attitudes of children to the uses of animals. International Journal of Science Education, 15, 411–425. Ruaraidh Hill is a postgraduate student and Martin Stanisstreet is Senior Lecturer, both in the School of Biological Sciences, University of Liverpool. Helen O’Sullivan is Lecturer in the Department of Environmental and Biological Studies, Liverpool Hope University College. Edward Boyes is Senior Lecturer in the Department of Education, University of Liverpool. Ruaraidh Hill, Martin Stanisstreet and Edward Boyes are members of the Environmental Education Research Unit, Liverpool University. 30 School Science Review, June 1999, 80(293)
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