Escape responding in a shuttlebox

Measures of response latency are a primary tool for those who investigate escape responding in rats. Unfortunately, the single term “latency to escape” has been applied to several different measures of latency. The present study was designed to demonstrate that two different measures of the “latency to escape” tap different aspects of escape responding. To that end, rats were given escape training using a Sidman Avoidance Schedule with brief inescapable electric shock as the aversive stimulus. The latency to escape the shock-shock interval, as measured from the onset of the last shock in a shock period, did not change across trials. However, the latency to escape the shock period, as measured from the onset of the first shock in a shock period, decreased across trials. In addition, the presentation of a feedback stimulus contingent upon escape responding did not affect the latency to escape either the shock period or a shock-shock interval. The results show that these two latency measures, typically not recognized as unique, measure different characteristics of the strength of escape responding in a shuttlebox. Alternative accounts of this pattern of data were considered.     

A magnitude-estimation response pool for production of lingual vibrotactile magnitudes

The present pilot study was designed to obtain samples of numerical vibrotactile magnitude estimations from two groups of 37 randomly selected subjects (Mage = 22.04 yr.) and to determine if these numbers were statistically equivalent. Analysis showed the numerical responses of the two groups of subjects were statistically equivalent. It was suggested that they might be viewed as a representative sample of magnitude-estimation numbers that could be employed in experimentation on lingual vibrotactile magnitude production.     

Congruence and temporal stability of multimiethod profiles: A new pair of personality variables

Congruence and temporal stability of multimethod profiles within the individual subject were studied as proposed new personality variables in a pool of seven small groups of graduate students in clinical psychology (N= 51) Sex differences were minimal A Stability Index was derived from (a) Q correlation stability coefficients obtained from the single method profiles of an inventory, self-ratings, and mean ratings by others, or (b) absolute difference scores between the composite profiles on occasion 1 and occasion 2 A Congruence Index was derived from (a) Q correlation coefficients obtained from each pair of profiles measured by the three methods for each subject, or (b) mean absolute difference scores obtained from each pair of method profiles These moderately correlated indices were used as dependent variables in stepwise multiple regression analyses, in which scores on a profile of 21 personality variables served as independent variables Although the difference score method was at least as effective as the correlational method in predicting congruence, the Q correlational method was superior in all other analyses conducted in this study Persons high in temporal stability seem to maintain an intellectually searching and interpersonally affiliative approach to the environment, showing little hostility and little tendency to seek change in current life circumstances The highly congruent individual seeks a positive nurturant interaction with other persons, gains pleasure from both sensory and interpersonal experiences, and shows little discontent with present life circumstances