Effects of level of retrieval success on recall-related frontal and medial temporal lobe activations

Brain dedicated single photon emission computed tomography (SPECT) was used to compare the neuroactivation produced by the cued recall of response words in a set of studied word pairs with that produced by the cued retrieval of words semantically related to unstudied stimulus words. Six of the 12 subjects scanned were extensively trained so as to have good memory of the studied pairs and the remaining six were minimally trained so as to have poor memory. When comparing episodic with semantic retrieval, the well-trained subjects showed significant left medial temporal lobe activation, which was also significantly greater than that shown by the poorly trained subjects, who failed to show significant medial temporal lobe activation. In contrast, the poorly trained subjects showed significant bilateral frontal lobe activation, which was significantly greater than that shown by the well-trained subjects who failed to show significant frontal lobe activation. The frontal activations occurred mainly in the dorsolateral region, but extended into the ventrolateral and, to a lesser extent, the frontal polar regions. It is argued that whereas the medial temporal lobe activation increased as the proportion of response words successfully recalled increased, the bilateral frontal lobe activation increased in proportion to retrieval effort, which was greater when learning had been less good.     

A transfer of self-discrimination response functions through equivalence relations

The present study tested the idea that human self-discrimination response functions may transfer through equivalence relations. Four subjects were trained in six symbolic matching-to-sample tasks (if see A1, choose B1; A1-C1, A2-B2, A2-C2, A3-B3, A3-C3) and were then tested for the formation of three equivalence relations (B1-C1, B2-C2, B3-C3). Two of the B stimuli (B1 and B2) were then used to train two different self-discrimination responses using either detailed instructions (Subjects 1 to 3) or minimal instructions (Subject 4) on two complex schedules of reinforcement (i.e., subjects were trained to pick the B1 stimulus if they had not emitted a response, and to pick the B2 stimulus if they had emitted one or more responses on the previous schedule). All 4 subjects showed the predicted transfer of self-discrimination response functions through equivalence relations (i.e., no response on the schedule, pick C1; one or more responses on the schedule, pick C2). Subjects also demonstrated this transfer when they were required to discriminate their schedule performance before exposure to the schedule (i.e., “what I intend to do”). Four control subjects were also used in the study. Two of these (Subjects 5 and 6) were not exposed to any form of matching-to-sample training and testing (nonequivalence controls). The 2 remaining subjects (7 and 8) were exposed to matching-to-sample training and testing that incorporated stimuli not used during the transfer test; C1 and C2 were replaced by N1 and N2 during the matching-to-sample training and testing, but C1 and C2 were used for the transfer tests (equivalence controls). All 4 subjects failed to produce the self-discrimination transfer performances observed with the experimental subjects.     

An investigation into the perception of dominance from schematic faces: A study using the World-Wide Web

The World-Wide Web (WWW) is considered to be a viable tool for scientific research, and several investigators have already made use of it in their studies. Although the WWW allows researchers to access a vast subject pool, questions of reliability and validity need to be addressed before it is incorporated into mainstream research. By replicating, on the Internet, an existing study (Keating, Mazur, & Segall, 1977) on the perception of schematic faces, we were able to conclude that experimental work carried out in this manner is not necessarily biased by the medium. One difference from previous work was the effect of a smiling versus a nonsmiling face on the perception of dominance, given an identical brow position for the two faces. This was replicated on a different occasion with different subjects, which may represent a shift in attitudes to this facial configuration since the original study was conducted. Young North American males were overrepresented in our sample, but comparison with other surveys indicates that the population sampled by the Internet is becoming more representative.     

The Behavior of Organisms?

The Psychological Record - The term & #x2018;organism & #x2018; enjoys a revered place within the vocabulary of behavior analysis, most notably perhaps within the title of...     

The canonical relationship between the Differential Ability Scales Upper Preschool Verbal and Nonverbal clusters

The canonical relationship of the Verbal and Nonverbal clusters of the Differential Ability Scales Upper Preschool Level was studied. The two clusters share 45% of their variance. Independent interpretation of the Verbal and Nonverbal scales was supported.     

Alcohol consumption, alcohol abuse, personality and female perpetrated spouse abuse

As part of the Winnipeg Health and Drinking Survey, this study examined the problem of female perpetrated spouse abuse and its relationship to alcohol consumption and personality. Subjects were drawn from a random sample of Winnipeg residents (N = 1257) between the ages of 18 and 65 years. For this study, data from the subsample of female subjects who were married or cohabiting (N = 452) were analyzed. Results show that more than 39% of female subjects participated in some form of spouse abuse with their male partners. Being young and having high scores on Eysenck's psychoticism scale, the Neuroticism Index and the MacAndrew Scale were found to be significant risk factors in the occurence of partner abuse among females. Also, the interaction between alcohol consumption and Eysenck's psychoticism scale was found to be a weak but significant predictor for this form of violence.     

The common beliefs survey III and its subscales: Discriminant validity in clinical and nonclinical subjects

Scores on irrational beliefs inventories usually correlate well with scores on questionnaires about emotional feeling states, consistent with central tenets of RET and cognitive therapy. However, without specific demonstrations of beliefs inventories' discriminant validity, it is possible that they would correlate well withany questionnaire about negative states or events, thus limiting conclusions about links between thoughts and feelings. In a test of the discriminant validity of the Common Beliefs Survey (CBS), we examined responses to a battery of questionnaires on beliefs and emotional states that had been administered to 151 subjects drawn from samples of college students, hospital staff members, mental health center outpatients, and state hospital inpatients. Results were that the CBS shows (a) satisfactory internal consistency; (b) discriminant validity in that its subscales on self-criticism and perfectionism clearly differentiate clinical from nonclinical subjects; (c) the predicted strong correlations with questionnaires on emotional feeling states; (d) convergent validity in showing a strong correlation with another beliefs inventory; and (e) discriminant validity in correlating more strongly with the other beliefs inventory than with most of the questionnaires on feeling states. The CBS thus shows some respectable psychometric properties that justify its further refinement as a clinical instrument.Geoffrey L. Thorpe is associate professor and Director of Clinical Training in the psychology department of the University of Maine.Jefferson D. Parker is a doctoral candidate in clinical psychology at the University of Maine.ary S. Barnes received his Ph.D. in clinical psychology at the University of Maine in 1989.     

Personality characteristics of smokers and ex-smokers

The present paper examines the relationship between personality and smoking status in a random sample of 1257 adults. A broad sample of personality constructs were assessed to cover the major dimensions of personality. These included the EPQ, MMPI MacAndrew and Ego Strength scales, the Vando augmenter-reducer scale, the trait subscale of the STAI and the Rosenberg self-esteem scale. Factor analysis suggested that trait anxiety, neuroticism, self-esteem and ego strength could be grouped into a construct analogous to Esysenck's notion of neuroticism. Extraversion, augmenting-reducing, and the MacAndrew scale were grouped into a construct called extraversion. Results showed that smokers were the most extraverted group. Gender differences in the relation between smoking and neuroticism were found. Male smokers were much more neurotic than non-smokers and men who quit smoking, whereas there were no group differences in neuroticism for women. Both male and female smokers were high on psychoticism.     

Concurrent activities and instructed human fixed-interval performance.

Two experiments explored the effects of two types of concurrent activity on human fixed-interval performance. Eight adult subjects were given access to either reading material or a working television set across three fixed-interval values (60 s, 300 s, and 600 s). During Experiment 1, 2 subjects produced "scalloped" patterns and reported no verbal regulation (e.g., counting) in the presence of the reading material, but shifted to low-rate patterns and reported verbal regulation when the reading material was withdrawn. The 2 other subjects in Experiment 1 produced consistent low-rate performances and reported verbal regulation during access to reading material. However, when these subjects were given access to a working television set, they produced scalloped patterns and reported no verbal regulation. During Experiment 2, 4 experimentally naive subjects showed consistent scalloped patterning and no verbal regulation across fixed-interval values when they were allowed to watch television. When access to the television was denied, subjects reliably reported verbal regulation, and low-rate patterns emerged. These behavioral effects focus our attention on the contingencies that control human performance on fixed-interval schedules.