Taking personality selection bias seriously in animal cognition research: a case study in capuchin monkeys (Sapajus apella)

In most experimental work on animal cognition, researchers attempt to control for multiple interacting variables by training subjects prior to testing, allowing subjects to participate voluntarily, and providing subjects with food rewards. However, do such methods encourage selection bias from subjects’ personalities? In this study, we trained eighteen zoo-housed capuchin monkeys (Sapajus apella) for two experiments, under conditions of positive reinforcement (i.e. food rewards) and free-choice participation. Using a combination of behavioral and rater-based methods, we identified and validated five personality dimensions in these capuchins (Assertiveness, Openness, Neuroticism, Sociability, and Attentiveness). Scores on Openness were positively related to individual differences in monkey task participation, reflecting previous work showing that such individuals are often more active, curious, and willing to engage in testing. We also found a negative relationship between scores on Assertiveness and performance on tasks, which may reflect the trade-offs between speed and accuracy in these animals’ decision-making. Highly Assertive individuals (the most sociable within monkey groups) may also prioritize social interactions over engaging in research. Lastly, monkeys that consistently participated and performed well on both tasks showed significantly higher Openness and lower Assertiveness compared to others, mirroring relationships found between personality, participation, and performance among all participants. Participation and performance during training was clearly biased toward individuals with particular personalities (i.e. high Openness, low Assertiveness). Results are discussed in light of the need for careful interpretation of comparative data on animal cognition and the need for researchers to take personality selection bias more seriously.     

Impact of chronic illness: Differing perspectives of younger and older women

Abstract

The purpose of this study was to examine the life experiences of six women with chronic illness who represent three differing life stages. The participants included two women who were in young adulthood, two who were between the ages of 40 and 60, and two women in their late 70s. The women were all diagnosed with multiple sclerosis, systemic lupus erythematosus, rheumatoid arthritis, osteoporosis, or a combination of these disorders. They were interviewed concerning the impact illness has had on their lives, the manner in which chronic illness has altered their self-perceptions, and the ways in which they have come to make meaning from the event. While the women had achieved varying levels of acceptance of their illness, it appeared that the ability to cope was dependent on numerous factors across several life circumstances. Distinctions were made regarding ability to either adjust to the illness or use the experience as a catalyst for personal growth.     

Multiple trajectories of physical aggression among adolescent boys and girls

Latent growth mixture modeling was used to identify discrete patterns of physical aggression from Grades 7 to 11 among a sample of 1,877 youth. Four trajectory classes adequately explained the development of physical aggression in both boys and girls: Low/No Aggression; Persistent High Aggression; Desisting Aggression, characterized by decreasing risk throughout adolescence; and Adolescent Aggression, characterized by low early risk that increases until Grade 9, levels out, and then declines in late adolescence. Girls were less likely than boys were to be in any trajectory besides the Low/No Aggression trajectory. Parental supervision, deviant peer association, academic orientation, impulsivity, and emotional distress at Grade 7 were all strongly associated with trajectory class membership. These associations did not differ by gender. These findings strongly suggest that the processes involved in the development of physical aggression in adolescence operate similarly in boys and girls.     

Fit inside the work‐family black box: An ecology of the life course,cycles of control reframing

Scholars have not fully theorized the multifaceted, interdependent dimensions within the work‐family ‘black box’. Taking an ecology of the life course approach, we theorize common work‐family and adequacy constructs as capturing different components of employees' cognitive appraisals of fit between their demands and resources at the interface between home and work. Employees' appraisals of their work‐family linkages and of their relative resource adequacy are not made independently but, rather, co‐occur as identifiable constellations of fit. The life course approach hypothesizes that shifts in objective demands/resources at work and at home over the life course result in employees experiencing cycles of control, that is, corresponding shifts in their cognitive assessments of fit. We further theorize patterned appraisals of fit are key mediators between objective work‐family conditions and employees' health, well‐being and strategic adaptations. As a case example, we examine whether employees' assessments on 10 dimensions cluster together as patterned fit constellations, using data from a middle‐class sample of 753 employees working at Best Buy's corporate headquarters. We find no single linear construct of fit that captures the complexity within the work‐family black box. Instead, respondents experience six distinctive constellations of fit: one optimal; two poor; and three moderate fit constellations.     

Moods and Memories: Elation, depression, and the remembering of the events of one's life

Three experiments investigated the influence of current mood states on the remembering of past events of one's own life. In the first and the second experiment, participants were induced to experience either the mood state of elation or the mood state of depression. They then reported events and experiences that had occurred during the previous week. In the first and the second experiments, using converging methods for assessing memory for past events, participants differentially reported past events and experiences whose affective quality was congruent with their current mood states: participants in elated mood states preferentially reported pleasant events and happy experiences, and participants in depressed mood states preferentially reported unpleasant events and unhappy experiences. Additional evidence from the second experiment suggests that the differential remembering of affectively positive or affectively negative events requires that, at the time of the remembering of these events, participants actually experience the mood states of elation or depression and not simply attempt to remember past events that could account for elation or depression. In the third experiment, designed to assess the plausibility of “experimental demand” interpretations of these findings, participants who experienced ostensibly effective mood inductions that were actually ineffective failed to manifest differential remembering of affectively positive and affectively negative events. Implications of this series of experiments for understanding the mechanisms that may link moods and memories, as well as the intrapersonal and the interpersonal consequences of mood states, are discussed.     

A further examination of project aware: The relationship between teacher behaviors and changes in student behavior

The purpose of the present study was to examine specifically how teacher behaviors influence the effectiveness of a social development program entitled Project AWARE. Thirty-one teachers and two hundred and nine children were included in this study (82 at the primary level and 127 at the intermediate level). Participant teachers were rated in terms of their skill at implementation. For the intermediate grades, those teachers who received the highest skill ratings also tended to report positive changes in their children's behavior over the six months of the study. Those teachers who received the lowest skill ratings tended to report little change in behavior. For the primary grades, similar results were not obtained. Implications of these findings for implementation of classroom programs are discussed.     

The behavioural treatment of sexual inadequacy: A comparative study

Thirty-six couples complaining of sexual difficulties were treated with one of three methods: (1) systematic desensitisation plus counselling. (2) directed practice—based on that of Masters and Johnson—plus counselling. (3) directed practice with minimal contact. Both members of each couple were seen together, but half in each treatment group were treated by a single therapist and half by a therapist pair. Differences in outcome among the groups were not highly significant, but consistent trends were found which suggested that the combination of directed practice and counselling was associated with most change, particularly when two therapists were involved.     

Cognitions related to anxiety: a pilot study of treatment

In general, where anxiety appears to have a specific external focus, such as the situations which are avoided by phobic patients, treatment involving systematic exposure to those situations seems to be effective. This is less appropriate, or even impossible, where anxiety is not dependent on any external circumstance, but is described by the patient as occurring at any time or place, either chronically over long periods, or acutely in the form of ‘panic attacks’. These patients with ‘generalised’ anxiety often describe internal cues for anxiety either in the form of thoughts (e.g. worry over a current problem) or somatic (e.g. chest sensations interpreted as possible heart disease). Beck et al. (1974) has suggested that on interview, all patients diagnosed as suffering from diffuse or generalised anxiety can report specific ideas or other cognitive cues which are associated with anxiety. These usually concern possible traumatic events, such as illness and death, or social rejection. Clearly Beck has in mind the possibility that these cognitions have the effect of inducing anxiety, although even if the validity of the subjective reports were to be accepted, the problem remains of whether the relationship between mood state and cognitions is causal and if so, in which direction it operates. Obviously a causal relationship may also operate in both directions simultaneously, to form a ‘vicious circle’ in which each exacerbates the other. To establish whether there is a sense in which particular cognitions contribute causally to anxious mood, it would be necessary to find a method of manipulating the type or frequency of cognitions thought to be operating in this way.

One obvious possibility is that of ‘thought-stopping’: that is, patients could be taught to identify thoughts which are associated with anxiety and stop them in the usual way (Wolpe, 1973, p. 211) e.g. by' shouting stop, and substituting an alternative thought. The present study was planned as a pilot experiment to determine (i) if appropriate anxiety related cognitions could be elicited from a series of patients with generalised anxiety, (ii) if the reported frequency of such thoughts could be modified by a thought-stopping technique, and (iii) if any changes in thought frequency were associated with improvements in mood.

Clearly there are many ‘non-specific’ features involved in thought-stopping which could also have therapeutic effects on mood. For this reason it was necessary to include an alternative procedure, not directed at reducing thought frequency, but having the same degree of plausibility to patients, and preferably to therapists. The control procedure chosen for this purpose was modelled on desensitisation, in which patients were encouraged to allow the supposedly anxiety-provoking thoughts into their mind and tolerate them, rather than attempt to stop them. In summary, the study employed a relaxation training phase as a base-line, followed by a cross-over design in which the two treatment phases of thought-stopping and ‘cognitive desensitisation’ were given to each patient, in balanced order.