Temporal aspects of retrieval in short-term serial retention

In three experiments, temporal properties of memory retrieval are studied. Latency of positionally probed recall of a single item is measured as a function of its serial position (SP) in a serial list. The requested SP is indicated by a positional probe, presented immediately after the list. For two organizational structures of the list (i.e., grouped vs. ungrouped lists) the experiments study the effects of precueing the probe position briefly before probe presentation, the cue signal indicating the SPs relevant for recall. The problem of confounded effects on latency of requested SP and of probe-signal location is also investigated. A bow-shaped SP-curve is found for ungrouped lists; precueing reduces RT but does not affect the bowed shape. This argues against selective confounding effects of spatial probe position and also suggests that precueing preactivates memory access. Grouping the items into two sublists eliminates precueing effects for items around the group boundary. Furthermore, precueing is detrimental when SPs at opposite ends of the list are precued. This suggests that the available points of memory access can only be utilized one at a time, so that precueing is not beneficial when the item cannot be reached via the preactivated point. Although the notion of single access to memory is in accord with both positional cueing theory and non-associative hierarchical theories (e.g., Estes 1972), various details of the results are in favor of the first type of explanation.     

Choice based on separately established response tendencies: The effect of recency of reinforcement

The responding of pigeons was studied in a chamber with two adjacent keys that could each be lit with either a red or a green dot. Fixed-length trials were used, with pecking on positive trials reinforced by presenting food at the end of the trial. In each session the first 40 trials were one-key trials with one key lit on each trial, either red or green, and the next four trials were choice trials with both keys lit, one red and the other green. When blocks of sessions were presented in which all one-key trials were positive trials of a single color, choice responding gradually shifted to the color presented most recently during one-key trials. When all one-key trials were nonreinforced trials of a single color, responding on choice trials shifted toward the other color. When positive one-key trials of one color were intermingled with negative one-key trials of the other color, choice responding shifted exclusively to the reinforced color. These shifts in choice responding occurred even when responding on choice trials was never reinforced, and were viewed as based on separate response tendencies for pecking red and pecking green built up during one-key trials.     

Dependency and fault as determinants of helping

In a natural setting, helping was investigated as a function of a female requestor's dependency on the subject for help and whether or not she was at fault for her plight. Based on previous research and the hypothesized operation of two norms, it was predicted that the negligent requestor would be more likely to receive help than the victim of circumstance when her dependency was high, but would be less likely to receive help when her dependency was low. Randomly selected telephone subscribers received a “wrong number” telephone call from a stranded women motorist. The woman asked the subject to make a phone call for her; the dependent variable was whether the subject helped by making the call. Results were consistent with predictions. When dependency is high, the victim's negligence appears to operate as an indication of greater need, whereas when dependency is low, it seems to operate as a sign that the victim is less deserving of help. Results were discussed in relation to different social norms that may be activated as a function of the dependency of the requestor.     

Belief similarity and attitude similarity as determinants of interpersonal attraction

It was predicted that attraction would be a function of both attitude similarity and belief similarity, but that attitude similarity would have the greater influence. In Expt I, 60 subjects were presented with strangers that were either similar or dissimilar on attitude and on belief. Attraction was a positive function of both attitude similarity (p < .05) and belief similarity (p < .01). Experiment II replicated and extended Expt I with the addition of a 50% similar group for both attitude and belief. Attraction was a positive linear function of both attitude similarity (p < .001) and belief similarity (p < .02); departure from linearity was not significant. Attitude similarity also had greater effects on other aspects of interpersonal evaluation than belief similarity. The results were discussed in terms of the locus of reinforcement of attitude similarity and of belief similarity.     

Pavlovian processes and response competition as determinants of avoidance response-prevention effects

Two experiments investigated the facilitation of avoidance extinction by exposure to lengthy (5-sec) shock during avoidance response prevention. In Experiment 1, animals exposed to light only or to light-shock pairings during response prevention showed equal facilitation of extinction relative to shock-only animals or to animals receiving no response prevention. Preshock rearing, directly antagonistic to the avoidance response, developed for shocked animals during response prevention and persisted during extinction for light-shock animals. Immediately before extinction, half of each group was permitted a single escape from a light-shock compound by means of the response previously required for avoidance. The only effect was upon the extinction performance of light-shock animals. Rearing was eliminated and extinction responding increased to a level far above that for any of the other animals. Experiment 2 demonstrated that the shock-only treatment affected the extinction performance and rearing of nonescape and escape animals in a manner entirely equivalent to the effects of the light-shock treatment of Experiment 1, provided stimulus conditions (light absent) were the same for all experimental phases. Thus, lengthy shock during avoidance response prevention simultaneously leads to the acquisition of competing behavior and enhances control by a warning signal or contextual stimuli over the avoidance response. Implications for the CS-only response-prevention treatment and the transfer of aversive control are discussed.     

Association and affect as determinants of displaced aggression

Subjects were angered by an instigator and then given a choice of two targets of aggression: one was a friend of the anger instigator and the other not. In addition, subjects were given a choice of more versus less intense aggression against these two targets. Angered subjects chose to give more intense aggression—regardless of whether the target was associated with the anger instigator. Thus, release of affect (opportunity to aggress intensely) predominated over association as a determinant of displacement.     

Effects of performance expectancies created by peer comparison as related to social reinforcement,task difficulty,and age of child

Children in kindergarten-first grades and fourth-sixth grades (6 and 10 years of age, respectively) participated in one of two experiments and performed either a simple motor task or (for older children only) a two-choice simultaneous discrimination task at two difficulty levels. Children received either positive, negative, or no peer comparison statements (describing how other children their age had allegedly performed) and either praise, silence (in Experiment 2 only), or criticism on a fixed-interval 20-second schedule throughout the task. Young children were more responsive to adult evaluation of their performance than to peer comparison. Expectancies created by peer comparisons affected older children's motor performance most if they received reinforcement contrary to the expectancy. In situations requiring greater cognitive ability, older children, particularly boys, responded to the performance expectancies created by positive peer comparison. Older boys, compared with older girls, seemed to be more sensitive to peer comparison and social reinforcement.     

Congruency,consistency, and differentiation as predictors of job satisfaction within the nursing occupation

Holland's (Making vocational choices: A theory of careers, Englewood Cliffs, N.J.: Prentice-Hall, 1973) congruency, consistency, and differentiation terms were used as independent variables to predict job satisfaction (JS) within the scope of a single occupation, rather than on the comparison between occupations. Based on the responses of 126 registered nurses on the specially designed List of Courses in Nursing (LCN) Inventory the congruence hypothesis was confirmed, while the consistency and differentiation hypotheses were only partially supported. The hypothesis on the additive relationship among congruence, consistency, and differentiation with JS was confirmed. The theoretical and practical implications are discussed.     

Judging similarity among strings described by hierarchical trees

The paper compares the tree-theoretical model of similarity judgement (in which the similarity between two objects is a function of the distance between them in a conceptual tree) with an averaging model of similarity judgement that is drawn jointly from information integration theory and from current research indicating the prevalence of anchoring and adjustment mechanisms in judgement. Results of an experiment are presented that suggest that even when subjects organize conceptual material as a hierarchical tree, judgments of similarity among the objects are better accounted for by an averaging mechanism than by distances in the tree. These data are discussed in terms of the differences between the representation in which knowledge is encoded and the processes that operate on the represented information.     

The vocational side of a new start in life: A career model of immigrants

The research tests a career model of immigrants with the following stages: crystallization, vocational retraining, job entry and trial, establishment, and maintenance. Two samples of immigrants, one consisting of 89 newcomers and another consisting of 60 white-collar workers with an average seniority of 5 years in the country, are followed up during a period of 2 years, after initially taking a test battery measuring vocationally relevant traits. Dependent criterion variables are occupational government examinations and adjustment to the job. Smallest space analysis is used to construct the career space of the newcomer cohort, and multiple regression of criterion variables on success predictors was performed. Both methods confirmed the model. The need arose to reconsider the duration of career stages of immigrants and their link to certain ages in comparison to the models in use. The research brought into focus the continuity of the process of career reconstruction after the interruption of vocational activity caused by emigration.     

Generality of persistence: The role of stimulus and response factors in persistence to punishment

Previous research has shown that intermittent punishment of a response increases its persistence to continuous punishment and that intermittent punishment training in one situation produces persistence to continuous punishment in other situations. Experiment 1 showed that as long as the instrumental response and punishing stimulus were held constant from intermittent to continuous punishment marked differences between these situations had no decremental effect on persistence. Experiment 2 showed that intermittent punishment training of one response resulted in substantial persistence to continuous punishment of a different and apparently incompatible response and that such response change had no more than a marginal effect on persistence. The results were seen as requiring some revision to the traditional conditioning-model interpretation of persistence to punishment.     

Exposure and response prevention in the natural environment: A comparison with obsessive-compulsive patients

Thirteen obsessive-compulsive clients were treated with different methods of response prevention. Four experimental conditions were obtained through a 2 × 2 factorial design, in which the two main variables were varied: (1) gradual treatment vs flooding; and (2) modeling vs no-modeling. Clients were treated at their homes, three times weekly. Each session lasted 2 hr. Results at the post-test revealed, that modeling was superior to no-modeling (p < 0.05) on avoidance-other compulsions, therapist-rating only. On anxiety-main compulsions, clients rating the gradual method of treatment had been superior to flooding (p < 0.05). No other significant differences were found.     

Startbox-goalbox confinement durations as determinants of self-punitive behavior

Two levels of confinement duration (5 or 60 sec) in either startbox or goalbox were factorially combined with presence or absence of shock during extinction of a runway escape response in a self-punitive paradigm under a spaced-trials procedure. All groups were equated for amount and temporal spacing of handling before and after each trial. Shocked rats were more resistant to extinction than nonshocked rats only when startbox confinement was short. When startbox confinement was long, shock facilitated extinction. Long goalbox confinement enhanced running speed for shocked rats, but only in the presence of shock. It was suggested that duration of startbox confinement affects strength of conditioned fear, with long confinement leading to its extinction.     

Stimulus probability and prediction outcome as determinants of choice reaction time: Some procedural considerations

Effects of stimulus probability and prediction outcome on two-choice reaction speed (CRS) were determined when a frequency imbalance was reversed half-way through 300 samples of a 70/30 stimulus distribution and when the same 70/30 distribution was sampled for 1200 trials. Prior to each presentation Ss made a prediction; following each presentation Ss identified the stimulus by pressing a right-hand or left-hand trigger. CRS was faster to correctly predicted stimuli, and faster to the more probable stimulus. Ss who were informed of the frequency imbalance reacted significantly faster than Ss who were not. Both practice and boredom effects were demonstrated by using the extended number of trials. CRS was faster during the second session of 300 trials than during the first; after two sessions, CRS was slower during the second half of two additional sessions.     

Stimulus intensity effects on auditory and visual reaction processes.

Literature on the effect of stimulus intensity on reaction processes was reviewed. It was shown that there is no agreement as to whether intensity effects are limited to encoding or whether they are extended to later processing stages. The situation can be characterized as an asymmetry between modalities: vision is consistent with the first alternative and audition with the second.Chronometric analysis was used to bear on the question. It was shown that the effects of visual intensity and foreperiod (FP) are additive in a simple RT situation both for constant and mixed blocks FP. Auditory intensity and FP interact in both simple and two-choice situations. In a control experiment visual intensity and S-R compatibility were found to be additive. The asymmetry was accounted for by auditory alerting, previously discussed by several authors.The framework of stimulus intensity research utilizing RT measures was briefly evaluated.     

Effects of perceived similarity on vicarious emotional conditioning

The present experiment tested the hypothesis that perceived similarity between observers and models enhances vicarious emotional conditioning. Subjects were led to believe that they were either similar to the model in beliefs and attitudes, different from him or were given no information about him. They then underwent a vicarious classical conditioning procedure by witnessing the model express pain reactions in conjunction with a neutral stimulus. Observers developed emotional reactions to the neutral stimulus alone after seeing it paired with modeled pain expressions. Preceived similarity, however, had no significant effect on either the level of vicarious conditioning or the rate of extinction. Subjects who had no information concerning the model displayed stronger autonomic responses to the model's pain expressions, and more frequent and intense autonomic responses to the conditioned stimulus during tests for acquisition and extinction. In correlational analyses, subjects in the latter condition also yielded a significant positive relationship between self-reported arousal and vicarious emotional conditioning. The obtained findings were interpreted in terms of the emotion arousing properties of unfamiliarity.