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PubMed1998

Long-term memory of an operantly conditioned respiratory behaviour pattern in lymnaea stagnalis

The freshwater snail Lymnaea stagnalis breaths bimodally either through its skin (cutaneous respiration) or via a rudimentary lung opening called the pneumostome (aerial respiration). Aerial respiratory behaviour can be operantly conditioned. Animals placed in an aquatic, hypoxic environment received a tactile stimulus to the pneumostome area every time they attempted to breathe. Over a period of five training sessions (2.5 days), the animals learned not to breathe, and the number of stimuli received in the fifth session was significantly lower than in the first session. These changes in the respiratory behaviour following the operant paradigm were shown to persist for at least 24 h. We aimed to determine whether the changes in the learned behaviour would persist for longer. We obtained direct evidence that the behavioural changes following operant conditioning persisted for at least 4 weeks following the last training session. However, we found that the persistence of this memory was dependent upon the training procedure used. Memory persisted longer following a spaced training procedure (4 weeks) as opposed to a massed training procedure (2 weeks). Yoked control animals showed no changes in their respiratory behaviour over the same time periods. However, if these yoked control animals were subjected to an operant conditioning procedure, their ability to learn was not impeded. This study demonstrated that operant conditioning of a behaviour pattern in a molluscan preparation can result in long-term memory and that the persistence of the memory is contingent on the training procedure used.

Journal Article↗

PubMed2001

Juvenile-hormone-mediated plasticity of aggregation behaviour and olfactory processing in adult desert locusts.

In desert locusts Schistocerca gregaria, aggregation behaviour is elicited by aggregation pheromones. In this study, we show that the behavioural response to the major and most potent adult aggregation pheromone component, phenylacetonitrile, is age- and juvenile-hormone-dependent. Furthermore, we show that juvenile hormone influences the responsiveness of olfactory interneurons in the antennal lobe to aggregation pheromone, whereas the responsiveness of antennal receptor neurons is not changed. Old locusts and locusts injected with juvenile hormone, in contrast to young locusts and locusts deprived of juvenile hormone through allatectomy, i.e. after surgical removal of the gland producing this hormone, do not display any aggregation behaviour, as indicated by long-term behavioural observations. The lack of positive olfactory-guided behaviour coincides with an impairment of the central olfactory system, which displays a lower number of neurons responding to aggregation pheromone. Indirect and direct actions of juvenile hormone at different levels of the central nervous system may thus contribute to the regulation and modulation of behavioural responsiveness in the locust.

Acetonitriles↗

PubMed2000

Fighting in NIH/S male mice: consequences for behaviour in resident-intruder tests and physiological parameters.

Fighting is known to occur frequently in male mouse groups. In this study with outbred NIH/S mice, the possible impact of individual aggressiveness on fighting in groups and on the social status of animals was studied. Male mice were pre-tested in a resident-intruder (RI) test and rated as initially aggressive or non-aggressive according to their attack behaviour against an intruder. Thereafter they were randomly allocated to new social groups, with four mice per cage. Fighting in groups was increased when several initially aggressive animals were included in the group. Within the groups, animals were rated as dominants and subordinates according to their behaviour toward a strange intruder introduced into their home-cage (Group Intruder, GI) test and the occurrence of wounds. Additionally, subordinates were divided into aggressive and non-aggressive categories according to their behaviour in the second RI test, which was performed 3 weeks after grouping. The behaviour in the RI test prior to group-housing did not predict the individual social status or possibility of being wounded in the new social environment. On the other hand, the social relationships in the new group affected the behaviour in a subsequent RI test. All dominants showed aggressive behaviour during the second RI test. Those subordinates which behaved aggressively during this test received the most numerous and serious wounds, suggesting that in the new groups their interactions with the other group members were mostly aggressive. The reduced weight of epididymal adipose tissue in dominant and aggressive subordinates may indicate that they had fought continuously. Social status or levels of fighting in a group did not affect individual weight gain or the other physiological parameters measured. The wounded animals had enlarged spleens and reduced weights of epididymal adipose tissue, which were probably the results of increased activity of the immune system and reduced welfare, respectively. In conclusion, individual aggressiveness seems to be greatly affected by the demands of the social environment. Fighting in mouse groups leading to wounded animals may have effects on physiological research parameters.

Adipose Tissue↗

PubMed2006

Effects of light or dark phase testing on behavioural and cognitive performance in DBA mice.

Behavioural experiments in mice are often carried out during the resting phase of these nocturnal animals. Ignoring the fact that mice are more active during the dark period, results from resting-phase testing has also been used to characterize these animals. Since the influence of the light/dark cycle on testing is likely to be a relevant factor for the analysis of behavioural results, the aim of this study was to evaluate the effects of the relative time of the day as well as light conditions during testing on behavioural and cognitive performance in inbred mice. Naïve DBA/2N (DBA) mice were tested in the modified hole board (mHB) either during the dark phase under red light or during the light phase under white light. Different behavioural dimensions and cognitive functions were evaluated in parallel. Depending on the testing conditions, the results showed significant differences in behavioural activity, with DBA mice being less inhibited during dark phase. The same experimental group made fewer memory errors in a visuo-spatial task and showed a faster habituation compared with the group tested during the dark phase. From the results we conclude that testing during the light phase induces a pronounced behavioural inhibition as well as a cognitive disruption in DBA mice, which should be taken into account when cognitively testing these animals.

Animals↗

PubMed1996

Reflections on the first decade of the HIV/AIDS pandemic: opportunities and priorities for international behavioural research and interventions.

AIDS, a sexually transmitted disease, is unlikely to respond in the near term to either common sense or scientific innovation. Other forces are at play here that embrace the psychobiology of reproduction, addictive behaviour, and the social sciences. We must explore these matters within the historical and cultural context. We must push to the limit the science of behaviour and behaviour modification. To meet this challenge, the social and behavioural sciences and the natural sciences must form a new union in which the sum is greater than the parts. The integration of population biology into research strategies will require special attention. Planning the design and employment of interventions and the evaluation of their effects will require the use of mathematical models. Efforts to change individual and social behaviour must be tailored to the cultural circumstances of the afflicted populations. None of this will be easy. But the changing sexual behaviour among homosexual men and the increasing use of condoms by prostitutes and their customers in many societies stand as testimony to the power of public efforts.

Acquired Immunodeficiency Syndrome↗

PubMed2000

The maintenance of cooperative and helping behaviours in cooperative groups.

BACKGROUND: This study was a full-year investigation of whether children, who had previously been trained to cooperate and help each other, were able to use these behaviours in reconstituted groups without additional training one year later. AIMS: (i) To examine whether children who have previously been trained to cooperate demonstrate more cooperative and helping behaviours in their groups than children who had no been trained and (ii) to determine the effect of prior training on children's learning. SAMPLE: The study involved 144 Grade 2 children (mean age = 94.5 months; third year of schooling), from nine schools in a similar socio-demographic area of Brisbane, Australia. Sixty-four children, who had been trained in cooperative group behaviours in the previous year, were assigned to the Trained groups and 80 children, who had not received any training, were assigned to the Untrained groups. METHOD: The children worked in four-person, mixed-ability (high-, medium-, and low-ability), gender-balanced groups (2 males, 2 females) for one six-week social studies unit of work each term for three school terms. Videotaping occurred in the 5-6 week of each work unit. Videotapes were coded for behaviour and verbal interactions. Learning outcomes data were also collected. RESULTS: The children in the trained groups exhibited more cooperative behaviour and they provided more explanations, both in response to explicit and implicit requests for help across the three periods of time. The children in the trained groups used higher level cognitive strategies such as providing specific concrete facts and reasons in their interactions and they also obtained higher scores on the learning outcomes questionnaire than their untrained peers. CONCLUSION: Young children who have been trained to cooperate and help each other are able to demonstrate these behaviours in reconstituted groups without additional training a year later.

Child↗

PubMed2005

Patterns of language impairment and behaviour in boys excluded from school.

BACKGROUND: High levels of behaviour problems are found in children with language impairments, but less is known about the level and nature of language impairment in children with severe behavioural problems. In particular, previous data suggest that at primary age, receptive impairments are more closely related to behaviour problems, whereas expressive language has a closer link at a later age. AIMS: The study assessed expressive and receptive language problems in boys excluded from primary and secondary schools, to investigate the extent of impairment, the pattern of relations between age, receptive and expressive language, and relations with different aspects of behaviour. SAMPLE: Nineteen boys (8 - 16 years of age) who had been excluded from school and 19 non-excluded controls matched for age and school participated. METHOD: The sample was given assessments of: receptive language from the British Picture Vocabulary Scale (BPVS), and Wechsler Objective Language Dimensions (WOLD); expressive-language evaluations from the Wechsler Intelligence Scale for Children (WISC); auditory working memory evaluations from the Clinical Evaluation of Language Fundamentals (CELF); verbal reasoning (from the WISC); and non-verbal IQ assessments Raven's matrices. Teachers completed behaviour ratings using the Strengths and Difficulties Questionnaire (SDQ). RESULTS: Excluded boys were significantly poorer than controls on expressive measures but similar on receptive language and non-verbal IQ. Boys excluded from primary school were poorer than controls on auditory working memory. Expressive problems were linked with high levels of emotional symptoms. CONCLUSION: Many of the excluded boys had previously unidentified language problems, supporting the need for early recognition and assessment of language in boys with behaviour problems. Expressive problems in particular may be a risk factor.

Adolescent↗

PubMed1999

The influence of classroom peers on cognitive performance in children with behavioural problems.

BACKGROUND: Identifying factors linked to underachievement is fundamental to understanding the associated academic difficulties and crucial to the development of effective intervention strategies. Underachievement in a number of academic domains has been shown to be associated with behavioural problems in the classroom but the nature of the association and direction of any causal link has yet to be clarified. AIMS: This study explored the association between poor academic achievement and behavioural problems by examining the direct effects of peer presence on classroom performance in children with identified behavioural difficulties. Specifically, it was hypothesised that independent performance on a cognitive task would decrease as number of classroom peers present increased. SAMPLE: A total of 24 children attending two special schools for children with emotional and behavioural difficulties participated in the study. Age range was 9-14 years. METHODS: A within-subjects design was used in which performance on a set of perceptual/conceptual matching tasks was assessed under three conditions: the child working alone, alongside one other peer, or within a group of six. Measures of non-verbal intelligence and academic attainment were collected, along with teacher ratings of the severity of each child's problem behaviour. RESULTS: Performance was found to be significantly influenced by peer presence, both in terms of number of correct responses and time taken to complete the matching tasks. Direction of effects on these two performance indicators differed according to number of peers present. CONCLUSIONS: Findings highlight the importance of contextual factors in determining classroom performance in children with behavioural difficulties. Given the current pressure to educate all children in mainstream classes, findings have implications for classroom management.

Adolescent↗

PubMed1999

Problems of behaviour, reading and arithmetic: assessments of comorbidity using the Strengths and Difficulties Questionnaire.

BACKGROUND: Estimates of academic underachievement among school children vary widely, depending on the geographical location and on the criteria used to define attainment. AIM: To examine the relationship between behaviour problems and academic attainment in a large UK primary school. METHOD: A school population (364 children from Years 3 to 6 inclusive) were assessed on a range of cognitive ability tasks. These included standardised tests of reading, arithmetic and verbal and non-verbal intelligence. Under-achievement was assessed using different criteria. To assess behaviour, teachers completed the Strengths and Difficulties Questionnaire (Goodman, 1997) for each participating child. Finally, academic progress of a subset of children was assessed after one year. RESULTS: Indicated a significant relationship between behaviour and academic attainment; prosocial behaviour was positively correlated with reading and arithmetic, hyperactivity and conduct problems were negatively correlated. This association was especially strong in the children rated by the questionnaire as hyperactive, where around 1 in 5 had a specific reading deficit. However, there was no evidence to indicate that children with behaviour problems made less academic progress over a one-year period relative to their peers. CONCLUSION: The study highlights the importance of assessing both cognitive skills and behaviour, particularly when planning the educational management of children with reading difficulties.

Catchment Area, Health↗

PubMed2001

The Challenging Behaviour Scale (CBS): development of a scale for staff caring for older people in residential and nursing homes.

OBJECTIVES: A review of behavioural rating scales identified the need for a measure of resident behaviours that staff in care homes for older people find difficult to manage. A 25-item, broad-based rating scale, the Challenging Behaviour Scale (CBS), was developed to meet this need and its psychometric properties were examined. DESIGN: Cross-sectional surveys. METHODS: Ratings of 484 residents, living in 16 homes across England, were used to examine four methods of collecting inter-rater reliability data. Ratings of 382 residents living in 13 homes were used to evaluate criterion validity and to establish norms. Six further homes were used to explore qualitatively the validity of the suggested norms. Ratings of 98 residents living in four further homes were used to examine concurrent validity. The predictive validity of the CBS 'challenge' score was evaluated, using time-sampled direct observation of challenging behaviour in 237 residents, living in 11 homes. RESULTS: The scale records staff reports of the incidence, frequency and 'management difficulty' of resident behaviour and it can also identify 'challenging residents' through a computed score. It has good internal consistency, good test-retest reliability and adequate validity. Inter-rater reliability is good when staff receive training or when staff groups of at least three, of mixed qualifications, complete the scale. Norms are suggested for prospective studies of the prevalence of challenging behaviour. CONCLUSIONS: The CBS is quick to complete and may have potential for the evaluation of psychosocial interventions in care settings. It is, as far as we know, the first staff observational rating scale that is based on the reports of care staff, who constitute the backbone of residential care provision. Suggestions for improvements in criterion and content validity are outlined.

Aged↗

PubMed2005

The dilemmas of residential care staff working with the challenging behaviour of people with learning disabilities.

OBJECTIVES: To investigate residential care staff beliefs and feelings about the challenging behaviour of adults with learning disabilities in their care, and how they perceive these beliefs and feelings to have developed over time. DESIGN: A qualitative study using thematic analysis. METHODS: A group of 18 staff from 10 different residential services participated in indepth semi-structured interviews. Transcripts were analysed according to thematic analysis techniques drawn from interpretative phenomenological analysis (IPA) and grounded theory. The analysis was then subjected to scrutiny by participants using a respondent validation survey. RESULTS: Staff talked of dilemmas about whether challenging behaviour should be seen as a 'communication' of need or as a 'behaviour problem', how to balance a 'firm' response with 'kindness', and how to deal with unpleasant feelings evoked by the work, especially fear and frustration. Over time, staff reported overcoming initial fears of the client by 'getting to know them', or alternatively, avoiding the client, 'cutting off' emotionally, or protecting themselves with safety procedures. CONCLUSIONS: The analysis suggests that staffs are troubled by the limitations of a narrow behavioural discourse. Staff development and training based on richer approaches that integrate behavioural ideas with a value-based philosophy, might allow staff to respond to needs expressed by behaviour without fear of reinforcing it. Services should attend to staff emotional reactions to their work, to help them maintain nonavoidant coping strategies.

Adaptation, Psychological↗

PubMed2005

Bridging the intention-behaviour 'gap': the role of moral norm.

This research examined whether intentions aligned with moral norms better predict behaviour compared with intentions aligned with attitudes. Six data sets predicting behaviours in the health domain (smoking, driving over speed limit, applying universal precautions, exercising) were analysed. Moderated regression analysis indicated that participants whose intentions were more aligned with their moral norm were more likely to perform behaviours compared with participants whose intentions were more aligned with their attitude. However, further analysis indicated that this moderation effect was only present when participants construed the behaviour in moral terms. The findings suggest that the theory of planned behaviour should more clearly acknowledge the importance of internalized norms and self-expectations in the development of one's motivation to adopt a given behaviour.

Adolescent↗

PubMed1999

Interaction effects in the theory of planned behaviour: studying cannabis use.

This study employed the theory of planned behaviour (TPB) to investigate the factors underlying intentions and frequency of use of cannabis over a three-month period in a population of students (N = 249). In addition, several hypotheses in relation to the TPB were investigated. The TPB provided good predictions of both intentions (R2 = 0.653; attitude, injunctive norms and perceived behavioural control significant) and behaviour (R2 = 0.711; intentions significant). Other norm measures (descriptive and moral norms) explained additional variance in intentions (p < .01). In addition, habit strength and self-identity explained significant additional portions of the variance in intentions (p < .001), but not behaviour, over and above the TPB variables. Several interactions among these variables were also tested. Attitude moderated the impact of perceived behavioural control (PBC) on intentions (p < .001). Moral norms moderated the impact of attitudes on intentions (p < .001). Habit strength moderated the impact of self-identity on intentions (p < .001). PBC was found to moderate the impact of intentions on behaviour (p < .05). The findings are discussed in relation to how interaction effects further our understanding of the social processes by which variables are related in the TPB.

Adult↗

PubMed2001

Persuading school-age cyclists to use safety helmets: Effectiveness of an intervention based on the Theory of Planned Behaviour.

OBJECTIVES: To design and evaluate a theory-based intervention to encourage the use of protective helmets in school-age cyclists. DESIGN: Two-by-three mixed design on 97 cyclists who did not initially use a helmet: Condition (intervention/control) x Time (pre-intervention/immediately post-intervention/5-month follow-up). METHOD: The intervention builds on a previous study using the Theory of Planned Behaviour in which we identified a small number of salient beliefs that predict intention to use a safety helmet and helmet use (Quine et al., 1998). Participants were randomly assigned to intervention or control conditions. The intervention group was presented with a booklet containing a series of persuasive messages based on the identified salient beliefs, and the control group was presented with a different series of messages concerning a cycling proficiency and bicycle maintenance course. Initial beliefs were measured just before the intervention at Time 1, by questionnaire. The immediate effects of the intervention were evaluated by questionnaire at Time 2. Five months later, at Time 3, the long-term effects of the intervention on beliefs, intentions, and behaviour were assessed. RESULTS: The behavioural, normative and control beliefs and intentions of intervention participants became more positive than those of control participants, and the effect was maintained over time. There was also a significant effect on behaviour: at 5-month follow-up, none of the 49 control children had taken up helmet wearing, while 12 (25%) of the 48 intervention children had. CONCLUSIONS: The results suggest that in order to promote lasting helmet use in young cyclists, we need to change their beliefs. The intervention reported here may present an inexpensive solution to the problem of persuading adolescents to use safety helmets. The results point to the value of social cognition theories such as the Theory of Planned Behaviour in the design of effective interventions to change health behaviours.

Journal Article↗

PubMed2003

Help-seeking intentions for breast-cancer symptoms: a comparison of the self-regulation model and the theory of planned behaviour.

PURPOSE: Delays in seeking help for symptoms have been found to be associated with poorer outcome in breast-cancer patients. This study explores symptom perceptions and health beliefs as predictors of intentions to seek medical help in a general female population. The utility of the self-regulation model of illness cognition and the theory of planned behaviour were examined in predicting help-seeking intentions for potential symptoms of breast cancer in a general population sample. METHODS: A general population sample of 546 women completed a postal questionnaire comprising items examining components of the self-regulation model and the theory of planned behaviour. Help-seeking intention was determined by asking participants to rate the likelihood of visiting their GP for a range of breast symptoms. RESULTS: Hierarchical multiple regression analysis revealed that the cognitive component of the self-regulation model accounted for approximately 22% of the variance in help-seeking intention. Identity (beta = 0.45, p <.001) emerged as a significant predictor of intention to seek help. Inclusion of the components of the theory of planned behaviour accounted for an additional 7% of the variance; the significant predictors were attitude to help-seeking (beta = 0.19, p <.001) and perceived behavioural control (beta = 0.12, p <.01). CONCLUSIONS: Intention to seek medical help for a potential breast-cancer symptom may be mediated, partly, by cognitive representations of the identity and consequences of breast cancer and by attitudes towards help-seeking and perceived behavioural control. Although less than one-third of the variance was accounted for, these results have important implications for future research (in terms of identifying which variables should be examined) and for the development of a model of help-seeking behaviour in women with breast-cancer symptoms.

Adolescent↗

PubMed2004

Belief importance and the theory of planned behaviour: comparing modal and ranked modal beliefs in predicting attendance at breast screening.

OBJECTIVE: The objective of this study was, to compare the predictive utility of two measures of the attitude, subjective norm and perceived behavioural control constructs of the theory of planned behaviour (TPB; Ajzen, 1991) in predicting intention and subsequent attendance at breast screening. One construct was based on a modal set of underlying beliefs; the other was based on the three beliefs from each construct considered by the participant to be the most important. METHOD: We used a prospective, longitudinal design using a postal questionnaire at Time 1 and objective attendance data from screening records at Time 2. Questionnaires were sent to 1657 women from southeast England due to be invited for X-ray mammography under the UK's National Health Service Breast Screening Programme. After evaluating a set of modal behavioural, normative and control beliefs, women were asked to select the three beliefs they saw as the most important for them, and to rank them. The products of these three beliefs formed the 'important' (vs. the modal) measures. RESULTS: The 'important' attitude and subjective norm measures showed similar associations with direct measures and were equivalent to the modal measures in predicting intention and attendance at screening. The modal control construct was marginally more robust than the 'important' one in its association with the direct measure of control, and with intention. Key individual important beliefs that predicted intention and behaviour were identified. CONCLUSIONS: Measuring belief importance can help more fully identify the structures underlying attitude, subjective norm and perceived behavioural control, and can provide useful information when the TPB is used as the basis for intervention to help change behaviour.

Attitude to Health↗

PubMed2005

Causal beliefs and behaviour change post-myocardial infarction: how are they related?

INTRODUCTION: Weinman, Petrie, Sharpe, and Walker (2000) showed that the causal attributions of a sample of first-time myocardial infarction (MI) patients and their spouses from Auckland, New Zealand, were associated with changes in health-related behaviour over the first 6 months post-MI. However, their analyses did not control for pre-MI health-related behaviour. METHOD: This paper reports a re-analyses of the Auckland data, and a replication study conducted with 155 first-time MI patients in Brighton, United Kingdom (UK), to investigate whether baseline attributions for MI were related to health-related behaviour change at 6 months (N=132). Spouses (N=85) also completed the attribution questionnaire at baseline. RESULTS: There was no consistent relationship between the causal attributions of patients and subsequent behaviour change in Auckland and Brighton. For both samples, causal attributions were associated with pre-MI behaviour. CONCLUSIONS: The data from both samples suggest that the causal attributions of MI patients and their spouses may be realistic, but not predictive of subsequent changes in behaviour.

Aged↗

PubMed2005

Stress, oral health behaviour and clinical outcome.

OBJECTIVE: Several studies indicate that stress adversely affects various health behaviours. Oral hygiene behaviour, however, has been rarely studied in this context. The present study thus aims to assess the effects of stress on oral hygiene behaviour and clinical outcome. DESIGN: In a prospective matched controlled design 12 pairs of medical students, each consisting of 1 student participating in a major academic exam and 1 student not participating in any exams (control) were studied. METHODS: A professional tooth cleaning was performed 4 weeks prior to exams to obtain plaque levels of 0 at all sites. Immediately prior to professional tooth cleaning and 4 weeks after exams plaque levels (as indicator of oral hygiene behaviour) and bleeding on probing (an indicator of gingivitis) were assessed. RESULTS: No group differences were observed at the beginning of the exam period; after exams significant higher rates of plaque (p=.0005, d=1.74) and gingivitis (p=.016, d=1.01) were observed in exam students as compared with controls. CONCLUSIONS: The study illustrates the clinical significance of stress effects on health behaviour. Stress should be included as a factor in models of patient compliance and health behaviour.

Attitude to Health↗