Human peak shift: Analysis of the effects of three-stimulus discrimination training

In a series of studies, the effects of different types of intradimensional discrimination training on human auditory frequency generalization were examined. When subjects were trained with a single S− located on one or the other side of S+, postdiscrimination gradients were displaced away from S−. Subjects trained with two negative stimuli both on one side of S+ showed a greater extent of displacement with true peak shift. In a second experiment the procedures were repeated with two fixed amounts of training: either 12 or 42 training trials. Again the subjects trained with two negative stimuli showed more shift than those trained with one S−, and this effect was independent of amount of training. Experiment 3 showed increased peak shift when two positive stimuli surrounded a central S− as compared to groups with a single S+ and S−. The general conclusion is that training with more difficult, three-stimulus discrimination problems results in enhanced peak shift.     

Semantic knowledge as a determinant of developmental differences in recall

Two experiments examined the possible role of children's semantic knowledge and their ability to encode it in a cued-recall test. Performance of children aged 7, 10, and 13 was observed in encoding specificity tasks, which used homographs as the to-be-remembered words (TBRs).In Experiment I, children of all ages performed better when the output cue words prompted similar meanings to the input cues, than when output and input meanings were incompatible. In Experiment II, all children were required to recall identical items, but younger children, owing to lack of knowledge, were unable to encode pairs comprising input and TBR words incompatibly with output cues. In such circumstances, younger subjects outperformed older subjects. When input and output cues were incompatible for all ages, recall increased with age, possibly due to older childrens' using more effective retrieval strategies.The findings indicate that semantic encoding influenced recall performance at each age. This suggests that age differences in memory are due to differences in the amount of semantic knowledge a child possesses for encoding and cuing and not to capacity differences.     

Incidental Learning of Melodic Structure of North Indian Music

Musical knowledge is largely implicit. It is acquired without awareness of its complex rules, through interaction with a large number of samples during musical enculturation. Whereas several studies explored implicit learning of mostly abstract and less ecologically valid features of Western music, very little work has been done with respect to ecologically valid stimuli as well as non‐Western music. The present study investigated implicit learning of modal melodic features in North Indian classical music in a realistic and ecologically valid way. It employed a cross‐grammar design, using melodic materials from two modes (rāgas) that use the same scale. Findings indicated that Western participants unfamiliar with Indian music incidentally learned to identify distinctive features of each mode. Confidence ratings suggest that participants' performance was consistently correlated with confidence, indicating that they became aware of whether they were right in their responses; that is, they possessed explicit judgment knowledge. Altogether our findings show incidental learning in a realistic ecologically valid context during only a very short exposure, they provide evidence that incidental learning constitutes a powerful mechanism that plays a fundamental role in musical acquisition.     

Pavlov And Skinner: Two Lives In Science (An Introduction To B. F. Skinner's "Some Responses To The Stimulus 'Pavlov' ")

The sesquicentennial of Ivan Petrovich Pavlov's birth in September 1999 is being celebrated in Russia by a special issue of the Russian Journal of Physiology (the former I. M. Sechenov Physiological Journal, founded by Pavlov in 1917). The following article and the address by Skinner that it introduces are scheduled to appear in Russian translation in that special issue. Skinner's “Some Responses to the Stimulus ‘Pavlov’” was his presidential address to the Pavlovian Society of North America in 1966. The following article provides the context for Skinner's address by describing some ways in which Pavlov's research influenced Skinner's contributions.     

Examining the reliability and validity of an adapted scale of educational-vocational undecidedness in a sample of graduate students

The present study was an attempt to determine the reliability and validity of an adapted vocational indecision scale designed for undergraduates (Osipow, S. H., Carney, C. G., Winer, J. L., Yanico, B. J., & Koschir, M., In Journal of Vocational Behavior, 1976, 9, 237) for use in a graduate student population. Internal consistency, test-retest, interrater reliability, and validity coefficients were calculated. A factor analysis and a multiple regression were also conducted. The findings suggest that the characteristics of the adapted indecision scale for the graduate students sample are similar to the characteristics of the unadapted instrument for the undergraduate sample in the S. H. Osipow, C. G. Carney, and A. Barak (Journal of Vocational Behavior, 1976, 9, 223–243) study. Potential therapeutic and research uses of the adapted indecision scale are also discussed.     

Preference for modes of dispute resolution as a function of process and decision control

Research on procedural justice has suggested that the distribution of control among participants can be used to classify dispute-resolution procedures and may be an important determinant of preference for such procedures. This experiment demonstrates that control can be meaningfully divided into two components: control over the presentation of evidence and control over the final decision. The experiment placed subjects (law students and undergraduates) in a situation of conflict and varied two between-subjects factors: (1) Role, whether subjects expected to role-play third parties (law students) or litigants (undergraduates), and (2) Orientation, whether individuals focused on equity claims (appeals to a norm of fairness) or legal claims (appeals to a strict, legal interpretation of events). As a control, a third-party neutral-orientation condition was included. In addition, subjects were presented with four dispute-resolution procedures which varied in third-party control over the presentation of evidence (Process Control) and third-party control over the final decision (Decision Control) as within-subjects factors. Results revealed that both litigants and third parties preferred high rather than low third-party decision control. Litigants with an equity orientation preferred low third-party control over the presentation of evidence, particularly when third parties had high rather than low decision control. Third parties and litigants with a legal orientation preferred low rather than high third-party process control only when there was high third-party decision control. Litigant preferences were more affected by variation in process control than variation in decision control while third-party preferences were more affected by variation in decision control than in process control. As a check on external validity, military judges given a neutral orientation were asked to evaluate and express preferences for the four dispute-resolution procedures. Their results were not detectably different from those of the law students who role-played third parties in the main portion of the study.