Adult age differences in attentional allocation during memory search.

Young and older adults performed a memory search task in which, before probe onset, a cue indicated which of 4 memory-set items the probe was most likely to be. The results were consistent with an attentional allocation model in which performance represents a weighted combination, across trials, of focused (i.e., selective) versus distributed attention. The model significantly underestimated the reaction time required by miscued trials, probably because of the response inhibition occurring on these trials. The degree to which Ss relied on focused attention was significantly greater for older adults than for young adults. The estimated time required to shift attention between memory-set items was equivalent for the 2 age groups.     

Solving the eyewitness problem

Faulty eyewitness testimony is a major source of wrongful convictions. Four solutions are examined to safeguard against mistaken testimony having undue impact: (1) to overturn any conviction based solely on the uncorroborated testimony of a single eyewitness, (2) to require that an attorney be present at any pretrial identification procedure, (3) to allow an expert to testify during the trial about factors of perception and memory that could affect a witness's accuracy, and (4) to have the judge deliver a cautionary instruction to the jury, admonishing them to carefully scrutinize eyewitness testimony, or to educate them about such testimony. Each alternative is discussed within the context of psychological research and legal cases.     

Effects of different delay of reinforcement procedures on variable-interval responding

Two experiments studied responding in the rat when the first bar press after a variable period of time produced a cue light that remained on for either 10, 30, or 100 sec and terminated with the delivery of food. In Experiment I, response rate decreased and time to the first response after reinforcement increased as the delay of reinforcement increased. Similar results were obtained whether the delay consisted of retracting the lever during the delay, a fixed delay with no scheduled consequence for responding, or every response during the delay restarted the delay interval. In Experiment II, fixed-delay and fixed-interval schedules of the same duration during the delay period had no differential effect on either response rate or time to the first response after reinforcement, but differentially controlled responding during the delay periods.     

Automaticity and interference in bilinguals

Summary In an experimental study with 40 English-German and 40 German-Swedish bilingual high school students, automaticity and interference were analyzed on the basis of Shiffrin and Schneider's theory of controlled and automatic processing. Confirming the assumptions inferred from the theory, dominant bilinguals reacted significantly faster to pictured objects in their dominant language than did balanced bilinguals in either of their two languages. Interaction effects with frequency indicated less experience with rare words in the balanced groups. Matched on the basis of reaction time scores, the balanced groups continued to show a higher error rate in recall, but not in recognition when compared with the dominant groups. It was concluded that training alone could not account for the differences in recall. A congenitally determined mental speed factor was suggested for which the theory makes no direct commitment. The strong interrelation between automaticity and interference was shown; their significance for bilinguals in highly speeded and unstructured tasks was also shown. The results reveal high cross-cultural consistency.An earlier version of this paper was presented at the 3rd Nordic Symposium on Bilingualism, held in Umea, Sweden, June 4 to 5, 1980     

Fourier analysis of covert speech behavior

Frequency characteristics of electromyographic traces from the tongue and lips were studied as a function of class of phonemic input. Previous research has established that there are amplitude increases in the lips while processing bilabial linguistic units such as [p] and in the tongue when processing lingual-alveolar units (like [t]). Preliminary results using variability measures suggest similar conclusions for frequency parameters.     

Arithmetical calculations in monolinguals and bilinguals

Summary A series of 240 arithmetical problems requiring one, two, or three operations of the same kind were presented to 32 German-Swedish bilingual and 14 German dominant subjects in the age range 14–19 years. The results provide evidence that language has an important effect on arithmetical performance, affecting latencies and error rates. Generally the bilingual subjects needed more time to perform the tasks and made more errors than the monolingual subjects. The results are tentatively explained by retrieval interference and decay of memory trace and support an interdependence hypothesis of bilingual organization in memory.This research was supported by a grant from the Royal Swedish Academy of Sciences     

Development of intra- and interlingual interference in bilinguals

Developmental changes in intra- and interlingual interference were followed in 74 German-Swedish bilingual and 15 trilingual subjects using Stroop tasks for vision. The results provide evidence that the differential pattern of interference is mainly determined by language usage. Intra- and interlingual interference follow language dominance patterns in an everchanging process; hence, it is the point of measurement that determines whether equivalent or different amounts of interference are obtained. Stimuli characteristics determine points of language balance but are—like cognitive capabilities—of minor importance for the differential pattern of interference. Stroop task performance cannot be taken as evidence for or against the interdependence hypothesis of bilingual storage, since the Stroop situation does not permit one language to be turned off. Prolonged response times in multilinguals, found in this study, are more congruent with the interdependence hypothesis. By providing this developmental perspective, the current findings can explain previous contradictory results.This research was supported by the Bank of Sweden Tercentenary Foundation. It was reported in a paper presented at the 3rd International Conference on Psycholinguistics and Foreign Language Learning, Åbo, Finland, October 25–6, 1982.     

Social Concepts and Judgments: A Semantic Differential Analysis of the Concepts Feminist, Man, and Woman

Male and female participants  ( N = 274)  made judgments about the social concepts of feminist , man , and woman on 63 semantic differential items. Factor analysis identified three basic dimensions termed evaluative, potency, and activity as well as two secondary factors called expressiveness and sexuality. Results for the evaluative dimension showed that the concept feminist was rated negatively with male participants rating feminist more negatively than female participants. In terms of potency, feminist was judged higher than man whereas the concept woman was rated low on this dimension. Participants also judged the concept feminist as low in expressiveness and rated woman as the most expressive. Feminist received low ratings on the erotic-sexual dimension (sexuality) by female participants and negative sexuality ratings by men. These results are discussed in terms of social role theory, gender stereotypes, and the changes in women's roles and behavior.