Learning of magnetic compass directions in pigeons

A proof of magnetic compass learning by pigeons under laboratory conditions has been attempted for decades, but all experiments have failed so far. The aim of the present study was to test whether pigeons can learn magnetic compass directions in an operant chamber if magnetic cues are presented as true spatial cues. Experimental sessions were carried out in the local geomagnetic field and in magnetic fields with matched total intensity and inclination, but different directions generated with Helmholtz-coils. Birds demonstrated successful learning with a performance level comparable to that in learning studies with magnetic anomalies. In addition, we compared the data from magnetic learning in the laboratory with performance from homing experiments in the field. The birds that were more successful in the learning experiment had vanishing bearings farther away from the home direction than the group mean at unfamiliar, but not at familiar sites. This might suggest that better learners explore unknown locations in a different way. Our findings represent the first evidence for operant magnetic compass learning in pigeons and also provide a link between behavioural data from the field and the laboratory.     

Extraversion and rapid tapping: reactive inhibition or general cortical activation as determinants of performance differences

Two samples of subjects (n_tot = 22) scoring high or low on EPI-E tapped a morse-key as fast as possible over a 2-min period. As predicted, extraverts showed a lower tapping performance than introverts with differences between groups increasing significantly over time due to greater delays among the extraverts. Within the E dimension tapping differences could be shown to depend significantly only on the subfactor impulsiveness but not on sociability. There were no differences between groups, however, in frequency of involuntary rest pauses. Therefore the effects of extraversion on tapping performance should be explained more in terms of underlying differences in cortical arousal level than in terms of intermittent blocks as part of inhibitory potentials.     

Impression Management Behavior in Assessment Centers: Artificial Behavior or Much Ado About Nothing?

Candidates’ assertive impression-management (IM) behaviors affect performance ratings during selection interviews, a finding that has caused some concern about selection interviews’ objectivity and accuracy. Similar effects have been proposed for assessment centers, yet research on IM in assessments centers is rare and inconclusive. This study uses trait-activation theory (Tett &; Guterman, 2000 Tett, R. P. and Guterman, H. A. 2000. Situation trait relevance, trait expression, and cross-situational consistency: Testing a principle of trait activation. Journal of Research in Personality, 34: 397–423. [Crossref], [Web of Science ®] , [Google Scholar]) to predict how assertive IM-behaviors emerge and influence performance ratings during assessments centers. Results showed that candidates’ ingratiation behaviors related to observer ratings on the conceptually related AC-dimension cooperation, whereas self-promotion behaviors related to ratings on the dimensions leadership and planning. Furthermore, assertive IM behaviors during the assessment center construct-related validity and correlated significantly with candidates’ performance in non-evaluative situations. Consequently, assertive IM behaviors in personnel selection may pose less of a threat than frequently assumed but may partially reflect a behavioral manifestation of candidates’ underlying interindividual differences.     

Parent‐infant‐psychotherapy and psychoanalytic treatment: contradiction or mutual inspiration?

Psychoanalysis and parent‐infant‐psychotherapy are compared. Although parent‐infant‐psychotherapy developed from psychoanalysis, it appears at first glance not to be “analytic” with its aim of dealing quickly with the symptoms presented and also with its different setting. The author shows that an analytic approach in understanding the multi‐facetted net of relationships between family members and the infant in its “phantasmic interaction” and a consideration of the implication for analysis of the empirical research carried out in conjunction with parent‐infant‐therapy can lead to a fruitful exchange of ideas. One example of this is research into the correlation between attachment patterns and the processing of conflicts. Furthermore a dialogue between these two disciplines can remind psychoanalysts that a critical discussion of the external circumstances of their methods does not immediately call into question their fundamental approach to therapy: the work in transference on relationship fantasies.