Experimental manipulations of responsibility: An analogue test for models of Obsessive-Compulsive Disorder

Several authors attribute excessive responsibility a predominant role in Obsessive-Compulsive Disorder (OCD) [Salkovskis, P. M. (1985) Behaviour Research and Therapy, 23, 571–583; Rachman, S. (1993) Behaviour Research and Therapy, 31, 149–154; van Oppen, P. & Arntz, A. (1994) Behaviour Research and Therapy, 32, 79–87]. The present studies aimed at demonstrating the link between different levels of perceived responsibility and checking behaviors by experimentally manipulating responsibility in non-clinical Ss. In the first study, a sound recognition task was used to compare checking behaviors in Ss with high (HR) and low (LR) perceived responsibility. Only one variable was significantly different, Ss from the HR group reporting more anxiety during the task than Ss from the LR group. Results did not support a link between responsibility and checking behavior. In a second study HR and LR Ss were compared on a manual classification task. Subjects from the HR group hesitated and checked more, and reported more preoccupation with errors and anxiety during the task than Ss from the LR group. Since perceived severity of the outcome was the most variable affected by the manipulation, the implications for current models of OCD are discussed and an alternative explanation is attempted. Finally, clinical implications are examined and suggestions are made for future directions of research.     

Memory deficits in compulsive checkers: replication and extension in a clinical sample

Thirteen checkers and twelve noncheckers, identified on the basis of their responses to the checking subscale of the Maudsley Obsessional-Compulsive Inventory (MOCI; Rachman and Hodgson, 1980), were recruited from a sample of 99 consecutive admissions to the outpatient department of a community mental health center. Consistent with our previous research with nonclinical samples of college students (Sher et al., 1983, 1984), checkers were found to show deficits in memory, especially recall for recently completed actions, compared to noncheckers. This result demonstrates the replicability of our previous findings across different types of samples and implicates deficits in memory for actions as a potentially important determinant of checking behavior. Assessment of spontaneous imagery associated with the anamnestic process suggested that checkers utilized less imagery, especially visual imagery, when recalling biographical information. Additional measures collected at the time of testing indicated that checkers were more neurotic and reported more psychological distress than noncheckers.     

Memory and metamemory in obsessive-compulsive disorder

Studies on the link between checking and memory problems have produced equivocal results regarding a general memory deficit in patients with obsessive-compulsive disorder and subclinical checkers. However, there is clear and consistent evidence that patients with obsessive-compulsive disorder (OCD) show lack of confidence in their memory performance. The purpose of the present study was to investigate memory and metamemory performance (feeling-of-knowing judgments) for neutral and threat-related material in three groups: OCD patients (OCs), subclinical checkers (SCs), and normal controls (NCs). Participants studied a list of neutral and threat word pairs. After an initial cued-recall test, they provided feeling-of-knowing (FOK) judgments for unrecalled word pairs, followed by a recognition test. The results showed that OCs but not SCs were impaired in both recall and recognition compared to NCs. OCs were also less confident about their future memory performance than the other two groups, as reflected in their lower FOK ratings. Moreover, FOK judgments of the OCs were not reliable predictors of their recognition performance. Finally, neither OCs nor SCs showed any evidence of memory bias for threat-relevant information. The results support the idea of a general memory and a metamemory deficit in OCs.     

Deficits in set-shifting ability in nonclinical compulsive checkers

Recent studies suggest deficits in set-shifting ability in patients with obsessive-compulsive disorder (OCD) as measured by tasks such as the Wisconsin Card Sorting Test (WCST; Berg, 1948). The present study examined the extent to which these deficits were demonstrated by nonclinical subjects selected on the basis of their checking scores on the Maudsley Obsessional-Compulsive Inventory. A multivariate analysis revealed that frequent checkers performed significantly worse on the WCST than noncheckers, making more total errors and more perseverative errors and requiring more time to complete the test. A follow-up analysis on a subset of the original sample found similar performance deficits in checkers. While the poorer performance of checkers could be statistically accounted for by anxiety during the first administration of the WCST, anxiety could not explain the relationship between checking status and WCST performance at follow-up. Therefore, there does appear to be some relationship between checking status and WCST performance beyond what can be explained by affective variables.     

Cognitive deficits in compulsive checkers: An exploratory study

Compulsive-checking behavior can be conceptualized as resulting, in part, from a memory failure. In order to determine if memory difficulties are associated with compulsive checking, the performance of college-student checkers were compared with the performance of non-checkers on a number of cognitive tasks hypothesized to be relevant to understanding checking behavior. Using the Checking and Cleaning subscales of the Maudsley Obsessional-Compulsive Inventory, four groups of subjects were identified: (1) Cleaning Checkers (N = 13); (2) Noncleaning Checkers (N = 13); (3) Cleaning Noncheckers (N = 13); and (4) Noncleaning Noncheckers (N = 15). It was hypothesized that the cognitive deficits studied would characterize individuals with cheeking compulsions, but not persons with non-checking compulsions (i.e. Cleaning Noncheckers) or normal controls (i.e. Noncleaning Noncheckers). Compulsive checkers were found to have a poorer memory for prior actions than non-checkers and were also found to underestimate their ability at distinguishing memories of real and imagined events, a process referred to as reality monitoring. Both of these deficits were specific to compulsive checkers and can be viewed as contributing to the likelihood that an individual will engage in checking behavior. If an individual has difficulty in recalling whether an intended action has been executed, they may be inclined to engage in checking behavior to insure the intended action is carried out. Similarly, a tendency to underestimate reality-monitoring ability could result in increased checking behavior as the individual attempts to reduce his/her uncertainty over whether a previous behavior actually occurred or merely was thought to occur. It is concluded that the study of cognitive deficits in compulsive checking is a potentially fruitful avenue for further inquiry.     

The application of reinforcement and participant modeling procedures in the treatment of snake-phobic behavior

In Experiment I, one group of snake phobic Ss was reinforced (with tokens) for approaching a harmless snake. A second group received token reinforcement on a non-contingent basis, in the same setting, with a third group serving as non-treated controls. Although slight improvement was noted for all three groups, the groups did not differ significantly with respect to an increase in approach behavior or a reduction in subjective fear rating. A fourth group of snake phobic Ss was reinforced with money for approaching the snake, but showed no more improvement than the other three groups. In Experiment II. Ss who had participated in Experiment I were assigned to a participant modeling (P-M) group, in which they observed a fearless model interact with a snake and were subsequently guided through similar interactions with the snake, or to a non-treated control group. The P-M Ss showed a very marked decrement in snake phobic behavior (which generalized to a non-treatment snake) following the 40-min treatment, in contrast to control Ss who showed virtually no change.     

Cues to obsessive-compulsive symptoms: Relationships with other patient characteristics

The waxing and waning of symptoms in obsessive-compulsive disorder (OCD) suggests that environmental cues may impact on exacerbations of this disorder. Eighty-one Ss with OCD completed the Cues Checklist (CCL; Mackenzie, Ristvedt, Christenson, Lebow & Mitchell, 1992), a 339-item checklist of rationally-derived cues and circumstances that might be expected to elicit or worsen symptoms. Principal components analysis revealed four components: household order and organization, contamination and cleaning, negative affect, and prevention of harm and checking. Total number of cues endorsed and component scores were correlated with other characteristics of the disorder, and with the presence of other Axis I and II disorders. Patterns of cue endorsement related to standard measures of obsessive-compulsive content but not to symptom severity. Early-onset Ss endorsed a greater number of cues. History of depression, anxiety disorders and Axis II pathology related most strongly to scores on the negative affect component. The values and limitations of this approach are discussed.     

Predicting and remembering recurrent pain

Two groups of Ss suffering from recurrent episodes of pain (headache or menstrual) were studied over a period of weeks in order to determine if they tend to over-predict aversive events (pain in this instance). The results are consistent with earlier findings on fear pain. Contrary to earlier findings, however, after an under-predicted pain the menstrual Ss decreased their following prediction—suggesting the operation of a superordinate predictive pattern in this group. The Ss in both groups successfully predicted the qualities of their pain episodes, but tended to recall the episodes as being more painful than they had reported at the time of the pain episode. The explanation for the erroneous magnifications of predictions and reports of pain is not obvious. Over-predicting a potential pain, and remembering an episode as having been more painful than it was, may serve a protective function, but if so, these are not the most economical ways of achieving protection. The Ss who used medication expected to obtain moderate relief and they were not disappointed.     

Cognitive dysfunction in compulsive checkers: Further explorations

Recent evidence suggests a relationship between certain memory deficits and compulsive-checking behavior. The present study explores this relationship in the context of several additional memory capacities not yet investigated. Using the Maudsley Obsessional-Compulsive Inventory and the Everyday Checking Behavior Scale four groups of Ss were identified: (1) frequent checkers, (2) occasional checkers, (3) infrequent checkers and (4) noncheckers. Consistent with previous research, a memory-for-actions task indicated a deficit among compulsive checkers. Furthermore, checking status was found to be negatively related to memory functioning as measured by the Wechsler Memory Scale (WMS) and the Cognitive Failures Questionnaire (CFQ). This memory deficit was most pronounced on the Logical Memory subtest of the WMS. Checkers appear to have difficulty recalling details of meaningfully linked sequences, either presented in narrative form or engaged in personally. Although the reasons for these checking-related deficits are not clear, a complete understanding of checking phenomena will involve an appreciation of the role played by memory deficits.     

Stimulus overselectiv1ty of autistic children in a two stimulus situation

Autistic and normal children were trained to respond to a complex stimulus involving an auditory component (white noise) and a visual component (red floodlight). After the Ss had acquired this discrimination, the individual components were presented singly to assess their control over the Ss' behavior. The autistic Ss' unlike the normals, demonstrated stimulus overselectivity in that seven out of nine Ss responded to only one of the components. These results were consistent with those of a previous study where autistics showed stimulus overselectivity in an experiment involving three modalities. In both experiments, the previously non-functional stimulus was made functional when trained separately.     

高强迫症状个体的定向遗忘和元记忆

将定向遗忘和FOK判断的范式相结合,探讨高强迫症状被试（HOC）和低强迫症状的控制组（LOC）在不同词语类型的条件下,线索回忆和元记忆判断的定向遗忘效应的差异。实验结果表明,HOC组在中性词语条件下比LOC组表现出更低的定向遗忘效应。FOK的结果表明HOC被试对于不同条件的元记忆的分辨能力比LOC组要差,他们在威胁性词语方面,对未来记忆任务的成绩也没有预测性。研究结果从一定程度上支持强迫症的一般记忆损伤模型     

Eyewitness testimony and memory distortion

Abstract: Do memories change as we acquire new information? Recent research on memory distortion using implicit tests along with research using confidence is reviewed and new studies are presented. Two new studies asked misinformed subjects to provide reasons for their answers. In each study 15% to 27% of subjects said they remembered seeing items they had only read about. In another study subjects were asked to identify the source of misleading items they had seen in slides or read in misleading questions. Subjects were more likely to say they had seen in slides something they read about in the questions than they were to confuse information from two nearly identical sets of slides. Recent work shows that, not only is it possible to distort memory for events, it is possible to implant an entire memory for something that never happened. The evidence is now clear that we can become mentally tricked into making large as well as small changes in the way we recall the past.     

Are emotionally charged lures immune to false memory?

Using the Deese-Roediger-McDermott task and E. Tulving's (1985) remember-know judgments for recognition memory, the authors explored whether emotional words can show the false memory effect. Participants studied lists containing nonemotional, orthographic associates (e.g., cape, tape, ripe; part, perk, dark) of either emotional (e.g., rape) or nonemotional (e.g., park) critical lures. This setup produced significant false "remembering" of emotional lures, even though initially no emotional words appeared at study. When 3 emotional nonlure words appeared at study, emotional-lure false recognition more than doubled. However, when these 3 study words also appeared on the recognition test, false memory for the emotional lures was reduced. Across experiments, participants misremembered nonemotional lures more often than they did emotional lures, but they were more likely to rate emotional lures as "remembered," once they had been recognized as "old." The authors discuss findings in light of J. J. Freyd and D. H. Gleave's (1996) criticisms of this task.     

Memory and memory confidence in obsessive-compulsive disorder

Pathological doubt, often found in individuals with obsessive-compulsive disorder (OCD), has been theoretically linked to memory deficits, but empirical evidence for such deficits has been mixed. In contrast, many studies suggest that individuals with OCD have low confidence in their memories. The present study aimed to build upon previous research by measuring memory accuracy and confidence in OCD using ecologically valid, idiographically-selected stimuli. Individuals with OCD (OCs), anxious controls (ACs), and nonanxious controls (NACs) were exposed to a set of objects that the OCs had identified as safe, unsafe, or neutral. Participants were then asked to recall as many objects as possible and to rate their confidence in each memory. This process was repeated 6 times, using the same stimuli for each trial. Contrary to hypothesis, no group differences emerged in memory accuracy. However, OCs' memory confidence for unsafe objects showed a progressive decline over repeated trials. This pattern was not observed among NACs or ACs. Furthermore, OCs with primary checking reported lower confidence in long-term memory than did OCs without primary checking. These results suggest that when OCs are repeatedly exposed to threat-related stimuli (such as repeated checking), their level of confidence in remembering these stimuli paradoxically decreases.     

Influences of age, performance, and item relatedness on verbatim and gist recall of verb-noun pairs

Age differences in adults' memory for performed actions (e.g., wave hand) are sometimes smaller than age differences in memory for nonperformed phrases. In this study, we examined the conditions under which performance reduces age differences in recall. Younger and older adults performed or read verb-noun phrases that were either related (e.g., actions performed in a kitchen) or unrelated. Performance did not reduce age differences in recall of the exact verbs and nouns used to describe an action, but performance did reduce age differences in memory for the gist of related actions. Older adults especially had difficulty recalling the exact verb used to describe the action. These results suggest that older adults may have better memory for actions than is revealed by tests of verbatim recall. They may remember performing the action but not remember the exact words used to describe the action.     

Memory advantage for produced words and familiar native accents

Our memory is better for words that we have read aloud than for words that we have read silently or have listened to. The present study tested this memory advantage for words with native accent markers that participants were either highly familiar or less familiar. As in previous studies, produced words were subsequently remembered better than listened-to words. In contrast to previous studies that involved a comparison of global foreign accents with standard native accents, in the present study words with highly familiar accent markers were remembered better than words with less familiar accent markers (Experiment 1). The familiar accent advantage was also found when participants could not hear their own productions during the training phase (Experiment 2). When tested with a week delay, produced words were still remembered better than listened-to words, but the advantage for words with familiar accent markers was no longer found (Experiment 3).     

Adult Age Differences in Memory for Verbs and Nouns

Younger and older adults were asked to remember noun pairs (e.g., head – cap), verb pairs (e.g., bounce – throw), and verb-noun pairs (e.g., break – stick). For half of the pairs, participants used imagined objects and performed an action or series of related actions for each pair. For the other half of the pairs, participants read but did not perform the pairs. Free recall and cued recall tests revealed that age differences in memory for both performed and nonperformed items were larger for verbs than for nouns. The recall advantage of nouns over verbs was larger for older than for younger adults. Verbs are hypothesized to be more difficult for older adults to remember because they are more and less specific than nouns and because it is more difficult to integrate verbs with other words than to integrate nouns with other words.     

Systematic desensitization in an experimental setting: A follow-up study

A follow-up study was done of female college student volunteers who had been treated for marked fear of snakes using systematic desensitization under four experimental conditions. In the original study four groups were differentiated on the basis of: (1) therapeutic instructions and praise; (2) therapeutic instructions alone; (3) praise alone; and (4) neither therapeutic instructions nor praise. At follow-up Ss were reassessed on a behavioral test of their ability to approach and handle a snake, and were interviewed to determine whether they had discerned the conditions of the original experiment.

Twenty-five of the original thirty-two Ss (78 per cent) were assessed a mean of 9.5 months after their experimental post-test. All four groups maintained their original gains and the inter-relationships of the groups remained stable: only instructions had a statistically significant added effect over systematic desensitization; the reinforcement and interaction factors did not attain statistical significance. From the interview data it could not be demonstrated that Ss were aware of either the instructional or reinforcement conditions of their respective groups.     

Generating makes words memorable,but so does effective reading

In many experiments, memorial benefits have been found when subjects generate items from fragments rather than read items in their complete forms. Does generation cause-this-difference, or are subjects disposed to adopt different strategies when generating as opposed to reading? If generating causes the difference, items processed in the same way apart from a generative stage should therefore benefit from that generative stage. Our experiments did result in benefits for generating as opposed to reading, but only when the readers processed the words poorly—by pronouncing them. When the readers processed the items well, by imagining them, generating was no better than reading. A new generation effect was found in meta memory. Subjects thought they would remember more generated items than read items; however, the act of making the prediction entailed meaningful processing, and the generated items were not actually remembered better than the read ones.     

Predicting treatment preferences for agoraphobia

Fifty-one university students completed two questionnaires: (1) The Millon Behavioral Health Inventory (MBHI) and (2) a questionnaire evaluating Ss' ratings of acceptability and effectiveness of five treatments for agoraphobia (Norton, Allen and Hilton, 1983a). The results showed that the Ss rated the three psychological treatments as more effective and acceptable than the two drug treatments. A discriminant function analysis, using the coping style measures of the MBHI and the Ss' ratings of acceptability and effectiveness of tranquilizers as predictor variables, correctly classified 78% of the Ss as to which psychological treatment they rated as more acceptable and effective for agoraphobia.