Playful defensive responses in adult male rats depend on the status of the unfamiliar opponent

Adult male rats reared as pairmates from weaning were tested in a neutral arena with both members of another pair (one at a time). The unfamiliar pairs were found to engage in play fighting, although they were more likely to escalate the encounter into serious fighting than were pairs of familiar rats. Based on their within‐home pair behavior, each pairmate was designated as a dominant or a subordinate. When the test encounters between unfamiliar males were analyzed with regard to whether the pairings consisted of two dominants, two subordinates, or a mixed pair, the pattern of play fighting was found to be attenuated. Both dominants and subordinates were more likely to initiate playful encounters, to respond defensively during these encounters, and to do so using adult‐typical tactics of defense when paired with an unfamiliar rat that was dominant in its home cage. The mechanisms by which the home status of unfamiliar male rats can be identified by another male are discussed, particularly with regard to the role that play fighting may serve for this function. It is concluded that the data support the hypothesis that play fighting can be used by adult rats for social testing, which in this case seems to involve ascertaining the opponent's fighting capability. Aggr. Behav. 25:141–152, 1999. © 1999 Wiley‐Liss, Inc.     

Effect of body size on aggression in the ant,Cataglyphis niger (Hymenoptera; Formicidae)

In polymorphic ants, such as Cataglyphis niger, sterile individual workers from the same nest show some degree of variation in size and/or morphology. We studied whether worker size and size difference between opponents had an effect on aggression during conspecific encounters. Although the capacity to recognize nestmates was shared by all individuals, some patterns of agonistic behaviors were size related. Escape was mostly displayed by the small workers, and threat, associated with ritualized fights, by the large workers. As game theory predicted, ants of C. niger adjusted their level of aggression as a function of the size of the opponent. However, only large individuals used such assessment strategies, responding with escalation of aggression towards small workers and reduction of aggression towards large ones. On the contrary, small individuals behaved in the same manner whatever the opponent's size. Differences between both morphological castes were discussed with reference to the resource holding assessment models. Aggr. Behav. 25:369–379, 1999. © 1999 Wiley‐Liss, Inc.     

Identity processing style and cognitive attributional strategies: similarities and difference across different contexts

Identity processing style refers to the manner in which individuals approach or manage to avoid identity relevant problems and decisions. Two studies were designed to investigate the relationship between identity style and the specific cognitive and attributional strategies youth deploy in achievement and affiliative contexts. In Study 1, 198 American late adolescents filled in the revised Identity Style Inventory and a Strategy and Attribution Questionnaire. In Study 2, 109 Finnish late adolescents filled in the same measures. Study 1 revealed that diffuse/avoidant‐oriented American youth relied on maladaptive strategies in both contexts. Information‐oriented youth engaged in more strategic planning than did their normative and diffuse/avoidant counterparts. Study 2 indicated an identical pattern of associations among the identity processing styles and cognitive and attributional strategies for Finnish youth in achievement but not in interpersonal settings. The results are discussed in the context of a social–cognitive theory of identity development. Copyright © 1999 John Wiley & Sons, Ltd.     

A seven year follow-up of treating rumination with dietary satiation

”Fred“, a man with profound mental retardation who was 24 years old at the beginning of this study, was referred for treatment of rumination. A number of minimally restrictive interventions, including administration of Zantac, extra fluids, and delivery of peanut butter after meals, had been used without success. In April of 1989 Fred began a satiation diet with ad libitum access to starchy foods or to fruits and vegetables, in addition to his regular meals. His baseline weight was 82 pounds and he ruminated during 58% of 10 s intervals measured during 20 min post-meal observations. During the first month of the satiation diet, Fred's ruminating declined to 6% of measured intervals, he consumed a mean of 163 fluid ounces of extra food per day, and his weight increased to 90 pounds. After 4 months' treatment, Fred's ruminating had declined to zero, his food consumption had stabilized at approximately 65 extra ounces of food per day, and his weight had stabilized at about 120 pounds. Starting in August 1990, in an effort to minimize weight gain, extra food was limited to 50% of Fred's ad libitum food consumption (averaged over the previous 6 weeks). Fred's weight gradually declined to about 100 pounds with zero rumination over the next two years. In August 1992 Fred's ruminating accelerated to 17% of intervals and he was again offered ad libitum food access. Over the next 7 months, rumination declined to zero and his weight increased slightly to about 105 pounds. This study shows that rumination that had not responded to less restrictive procedures was suppressed for 7 years via dietary satiation. Although dietary satiation is not without some risk, Fred has suffered no adverse effects from the procedure, other than gaining approximately one-third of his baseline weight. © 1997 John Wiley & Sons, Ltd.     

“Bridging the Gap”: A reflexive thematic analysis of the experiences of therapy trainees transitioning from psychodynamic counselling to cognitive behavioural therapy

There is limited empirical research and insight into the experiences of therapy trainees who are being taught more than one psychotherapeutic approach during their training. Further understanding is warranted to ensure that a dual modality approach to training (that is, where therapists are trained in two paradigmatically distinct modalities) is experienced as worthwhile and acceptable to trainees and to better understand any challenges faced when transitioning between approaches. The aim of this study was to investigate trainees' experiences of transitioning from psychodynamic counselling to cognitive behavioural therapy (CBT) on a two-year master's degree that offers a dual modality approach to training. Data were collected from a sample of 8 trainees using an online semistructured questionnaire. These data were analysed using Braun and Clarke's (2020) reflexive thematic analysis. Four main themes were identified: (1) perceived competence; (2) preparedness; (3) professional advantages; and (4) external challenges. The findings suggested considerable individual variation in the ease with which participants navigated the transition between therapeutic modalities. Those who found the transition easier used the structure of CBT to provide a framework and point of difference that allowed them to temporarily suspend their psychodynamic learning in order to embrace a new therapeutic approach. Others experienced the move to CBT as posing a threat to their developing identities as counsellors. Recommendations are made on how to prepare trainees for the transition including exploring the psychological impact of transitions, increasing opportunities for reflective practice and facilitating exploration of what it means to be a therapist trained in two distinct therapeutic modalities.     

Genetic basis for male aggression and survivorship in wild house mice (Mus domesticus)

Work on the genetic region of the house mice known as the t-complex has produced the hypothesis that mice heterozygous for t-haplotypes (+/t) may have a selective advantage over wild-type (+/+) males owing to the greater aggressiveness of +/t males. We tested this hypothesis by examining the behavior of +/+ and +/t mice placed in four large outdoor enclosures. We found that +/t males were dominant over +/+ males. Furthermore, in the outdoor enclosures +/t males had higher survivorship than +/+ males, both as adults and juveniles. However, males of the two genotypes did not differ in home range size. We suggest that t-haplotypes may be, in part, maintained in mouse populations because of a selective advantage in heterozygous males. © 1996 Wiley-Liss, Inc.