Response monitoring and expectancy in random serial RT tasks

Two different sequential patterns have been reported in serial reaction-time (RT) tasks with random stimulus sequences, depending on the response-to-stimulus interval (RSI). When RSI is short a first-order repetition effect and a higher order benefit-only pattern are found, and when RSI is long a cost-benefit pattern is observed. In a series of three experiments, we found that the patterns are not unique for spatial dimensions, and that the benefit-only pattern does not appear for irrelevant stimulus features. The cost-benefit pattern, on the other hand, can shift to irrelevant locations, but not to irrelevant colour. Distributional analyses of the sequential effects demonstrate that the first-order repetition effect can be dissociated from the higher order effects. The results are interpreted as support for the role of response monitoring in the development of the benefit-only pattern at short RSI, while the first-order repetition effect is explained as repetition priming. With a long RSI, the cost-benefit pattern is confirmed as a low-level subjective expectancy process, which is primarily controlled by stimulus location. The data clearly strengthen the support for three different processes generating sequential effects in random serial RT tasks.     

Sequential effects on speeded information processing: a developmental study

Two experiments were performed to assess age-related changes in sequential effects on choice reaction time (RT). Sequential effects portray the influence of previous trials on the RT to the current stimulus. In Experiment 1, three age groups (7-9, 10-12, and 18-25 years) performed a spatially compatible choice task, with response-to-stimulus intervals (RSIs) of 50 and 500 ms varied between trial blocks. In Experiment 2, three age groups (7-9, 15-16, and 18-25 years) performed the task with spatial stimulus-response (S-R) mappings (compatible versus incompatible) varied between participants. For adults, the experiments yielded a pattern of sequential effects suggestive of "automatic facilitation" (i.e., a first-order repetition effect and a higher order benefit-only pattern for short RSIs) and "subjective expectancy" (i.e., a first-order alternation effect and a higher order cost-benefit pattern for long RSIs). Automatic facilitation was more pronounced for incompatible responses than for compatible responses. Both experiments showed the anticipated decrease in automatic facilitation with advancing age. Finally, the first-order alternation effect showed the predicted age-related increase, but the cost-benefit pattern revealed an opposite trend, suggesting that the first-order and higher order indexes of subjective expectancy may relate to dissociable mechanisms.     

The "Big Win" and Resistance to Extinction When Gambling

One hypothesis for the reason a person might become a pathological gambler is that the individual initially experiences a big win, which creates a fallacious expectation of winning, which may then lead to persistent gambling despite suffering large losses. Although this hypothesis has been around for several decades, only one controlled empirical study has addressed it, and that study reported null results. In the present experiment, the authors tested the "big win" hypothesis by having 4 groups of participants with little to no experience gambling play a computer-simulated slot machine for credits that were exchangeable for cash. One group experienced a large win on the very 1st play. Another experienced a large win on the 5th play. A 3rd group experienced 2 small wins on the 2nd and 5th plays. No other winning outcomes were programmed. The 4th group never experienced a win. The authors observed a significant effect of group. Participants who experienced a large win on the 1st play quit playing the simulation earlier than participants who experienced a large win on the 5th play. These results appear to question the "big win" as an explanation for pathological gambling. They are more consistent with a behavioral theory of gambling behavior. The present study should also promote the use of laboratory-based research to test long-standing hypotheses in the gambling literature.     

Electrometric Studies of Sleep

The authors provided a differential test between stimulus-stimulus (S-S) and stimulus-response (S-R) theory predictions in regard to the roles that the constructs of expectancy and of fear play in maintaining classically conditioned fear responding within the context of a human conditioned-avoidance paradigm. After the participants had developed sustained avoidance responding, their shock electrodes and avoidance response apparatus were removed to enhance the cognitive expectancy that the conditioned stimulus (CS) would not be followed by the unconditioned stimulus (UCS). This manipulation of expectancy was successful in 96% of the participants. The study was conducted over a 2-day period and involved 1 experimental group and 3 control groups. During the test trials, the authors used autonomic and self-report indices of fear to assess the presence or absence of fear to the CS. The data disconfirmed the prediction of the S-S theory that fear to the CS would be extinguished. The authors discuss the implications of this finding for S-S theories and for approaches in cognitive behavior therapy.     

An application of belief‐importance theory with reference to trait emotional intelligence,mood, and somatic complaints

Petrides, K.V. (2011). An application of belief‐importance theory with reference to trait emotional intelligence, mood, and somatic complaints. Scandinavian Journal of Psychology 52, 161–167. This article describes the basic principles of belief‐importance (belimp) theory and tests them in two empirical studies. Belimp theory hypothesizes that personality traits confer a propensity to perceive convergences and divergences between our belief that we can attain goals and the importance that we place on these goals. Belief and importance are conceptualized as two coordinates, together defining the belimp plane. Four distinct quadrants can be identified within the belimp plane (Hubris, Motivation, Depression and Apathy), broadly corresponding to the personality dimensions of trait emotional intelligence, conscientiousness, neuroticism and introversion. Study 1 (N = 365) defines the four quadrants in relation to goals about financial security and shows that they score differently on trait emotional intelligence, mood and somatic complaints. Study 2 (N = 230) defines the quadrants in relation to goals about appearance and, separately, in relation to goals about popularity, and replicates the findings of the first study. Strategies and requirements for testing belimp theory are presented, as are a number of theoretical and practical advantages that it can potentially offer.     

Outcome expectations and use of smokeless tobacco (snus): A cross‐sectional study among young Norwegian snus users

Wiium, N. & Aarø, L.E. (2011). Outcome expectations and use of smokeless tobacco (snus): A cross‐sectional study among young Norwegian snus users. Scandinavian Journal of Psychology 52, 64–70. In this study, measures of outcome expectancies related to use of snus (wet snuff) were used to predict reported frequency of snus use. Data stem from a nation‐wide survey in Norway among 16‐ to 20‐year‐olds. Only users of snus were included in the statistical analyses (n = 589). The main outcome measure, frequency of snus use, was measured as a categorical variable – occasional, weekly and daily use. Four dimensions of outcome expectancies (mood regulation, smoking control, weight control and negative health outcomes) were measured and confirmed in a confirmatory factor analysis. Informants tended to believe that snus use is harmful to health, but still they supported the idea of snus as a way to control own cigarette smoking. In a SEM model, two of the four dimensions of outcome expectancies turned out to be particularly significant predictors of frequency of snus use – mood regulation and smoking control. No significant interactions with gender were found. Males scored higher than females on “mood regulation”, and “smoking control”, while females scored higher than males on “negative health outcomes”. If more smokers were convinced that snus use is a less harmful alternative, more of them might start using snus, not only because there is some association between health outcome expectancies and snus use, but also because snus use by many is perceived as a remedy to stop smoking and as a way to gain some of the mood regulation benefits which are usually associated with smoking.     

Knowledge of the aetiology and cost of the nocebo effect is increasing,but conceptualising expectancy and partialling out misattribution remain challenges: Comment on Faasse (2019)

The nocebo effect is a concerning phenomenon in which adverse outcomes are triggered by the treatment context. Faasse (2019) summarises recent evidence on mechanisms of the nocebo effect, proposes an updated model, and describes emerging techniques for reducing the nocebo effect. Faasse's model marks an important advance over prior models focussing only on expectancy and classical conditioning by incorporating the role of anxiety, which emerging evidence indicates can mediate the nocebo effect. The review also emphasises the importance of preventing the nocebo effect, given its resistance to extinction, as well as the need for translational research, both of which are timely points. However, the review also raises two challenges for nocebo research. The first concerns the conceptualisation of expectancy, with Faasse's model appearing to combine expectancy and verbal information into a single node. Such an approach suggests that verbal information necessarily and only elicits nocebo effects via expectancy, which may not hold true. The second concerns distinguishing genuine nocebo effects from misattribution. Faasse's review intentionally focuses only on the former, but it is argued that understanding the latter is necessary to accurately estimate the true cost of the nocebo effect as well as for prioritising interventions to minimise non-medication side effects. As such, in addition to Faasse's call for translational research—which I fully support—I propose that key nocebo research goals should be to understand how verbal information elicits nocebo effects outside of expectancy and to tease apart genuine nocebo effects and misattributed adverse symptoms.