Practice and some methodological problems in unidimensional information transmission

Fifty circular lights differir.g in diameter from 4 to 53 cm and increasing by 1 cm were presented 135 times each to five Ss who were asked to identify each circle. Presentations were in random order. Indices of information transmission (T), response equivocation H S(R), and response uncertainty H(R) were calculated for different phases of the experiment for individual and pooled (across Ss) responses. Results have shown systematic rising of transmission and lowering of H S(R), while H(R) remained almost constant. All transmission indices calculated from pooled responses were systematically lower than comparable indices calculated from individual responses. Individual and pooled T values calculated from all responses given during the experiment were not representative for the level of identification performance at the end of the experiment. Conclusions were reached that (1) channel capacity indices should not be calculated from all individual responses given during the experiment or from pooled responses of different Ss, and (2) indices of channel capacity should be calculated only after the performance of Ss has reached a final and stable level, which means after enough repetitions of each stimulus.     

The psychology of leadership revisited: An overview

An overview of the concept of leadership as it appears in social psychology, psychoanalytic theory and group psychotherapy is presented. In the absence of a generally accepted global view of leadership, social psychology has produced limited-domain theories with relevance to group practitioners. Following Freud's early contribution on the subject, psychoanalytic investigators have neglected the subject of group psychology, and with it of leadership, until very recently. Within group psychotherapy some promising research and theorizing have emerged, but there is a need to distinguish between the roles of group leader and group therapist in both theory and practice.This paper was presented at the 1979 Annual Conference of the Eastern Group Psychotherapy Society.     

The echoes of Wundt's work in the United States, 1887–1977: A quantitative citation analysis

Summary The frequency of references to Wundt's book-length publications in experimental papers appearing in the American Journal of Psychology was determined. The most widely cited work, by far, is the Grundzüge der physiologischen Psychologie. The distinct decline of Wundt's impact on American psychology is clearly reflected in the frequencies of the citations.     

THE SOCIAL PSYCHOLOGY OF FALSE CONFESSIONS:

Abstract— An experiment demonstrated that false incriminating evidence can lead people to accept guilt for a crime thev did not commit Subjects in a fast- or slow-paced reaction time task were accused of damaging a computer by pressing the wrong key Alt were truly innocent and initially denied the charge A confederate then said she saw the subject hit the key or did not see the subject hit the key Compared with subjects in the slow-pace/no-witness group, those in the fast-pace-witness group were more likely to sign a confession, internalize guilt for the event, and confabulate details in memory consistent with that belief Both legal and conceptual implications are discussed.     

The impact of environmental noise on mealtime social interactions in a residential facility for persons with mental retardation

Four levels of environmental noise were experimentally manipulated during lunch and dinner in a residential living unit for 10 behaviorally disordered persons with mental retardation. During the highest noise conditions, there appeared to be some suppression of social interaction between these people, while interaction rates were uniformly higher during softer noise conditions. This effect was evident at both lunch and dinner. Staff members were less affected by the fluctuation in noise levels, although lunchtime staff engaged in more interactions with clients when both the radio and TV were played softly.     

Applications for tracking reading behavior on the Macintosh

Two applications for the Macintosh that permit students to read the sentences in a text in any order also provide a record of reading behavior from which processing time and reading strategies can be determined. The applications differ: READIT! presents the sentences one at a time, whereas SELECT THE TEXT presents the entire passage with a mask, which resembles the moving window technique. Unique to these applications is that students may return to sentences to reread them any number of times and in any order. Because these applications allow students to reexamine parts of the text, the reading that they enable is more similar to normal reading than has been the case with previous methodologies for tracking student reading behavior. The applications are described, and a summary of the major results of the work in which we have used the applications is provided.     

Locus of control and the learning of an artificial language

An experiment was conducted to explore the cognitive processes associated with locus of control beliefs. Internal and external subjects were instructed to remember as much as they can from an array of 21 letter strings generated from a finite state grammar. Although internals and externals did not significantly differ in their ability to recall these items, internals were better able to discriminate grammaticality and nongrammaticality in a new set of letter strings. Thus, although both groups attended to the exemplars, internals extracted more invariance and hence learned more about the underlying structure than externals. These results were discussed in relation to those of Wolk and DuCette (1974) on I-E and incidental learning.