Non-addictive psychoactive drug use: Implications for behavioral addiction

The newly proposed framework for non-addictive psychoactive substances postulated by Müller & Schumann (M&S) provides an interesting and plausible explanation for non-addictive drug use. However, with specific reference to the relevant behavioral addiction literature, this commentary argues that the model may unexpectedly hold utility not only for non-addictive use of drugs, but also for non-addictive use of other potentially addictive behaviors.     

Seeking Confirmation Is Rational for Deterministic Hypotheses

The tendency to test outcomes that are predicted by our current theory (the confirmation bias) is one of the best‐known biases of human decision making. We prove that the confirmation bias is an optimal strategy for testing hypotheses when those hypotheses are deterministic, each making a single prediction about the next event in a sequence. Our proof applies for two normative standards commonly used for evaluating hypothesis testing: maximizing expected information gain and maximizing the probability of falsifying the current hypothesis. This analysis rests on two assumptions: (a) that people predict the next event in a sequence in a way that is consistent with Bayesian inference; and (b) when testing hypotheses, people test the hypothesis to which they assign highest posterior probability. We present four behavioral experiments that support these assumptions, showing that a simple Bayesian model can capture people's predictions about numerical sequences (Experiments 1 and 2), and that we can alter the hypotheses that people choose to test by manipulating the prior probability of those hypotheses (Experiments 3 and 4).     

Factor Analysis of the Mystical Experience Questionnaire: A Study of Experiences Occasioned by the Hallucinogen Psilocybin

A large body of historical evidence describes the use of hallucinogenic compounds, such as psilocybin mushrooms, for religious purposes. But few scientific studies have attempted to measure or characterize hallucinogen‐occasioned spiritual experiences. The present study examined the factor structure of the Mystical Experience Questionnaire (MEQ), a self‐report measure that has been used to assess the effects of hallucinogens in laboratory studies. Participants (N = 1,602) completed the 43‐item MEQ in reference to a mystical or profound experience they had had after ingesting psilocybin. Exploratory factor analysis of the MEQ retained 30 items and revealed a four‐factor structure covering the dimensions of classic mystical experience: unity, noetic quality, sacredness (F1); positive mood (F2); transcendence of time/space (F3); and ineffability (F4). MEQ factor scores showed good internal reliability and correlated with the Hood Mysticism Scale, indicating convergent validity. Participants who endorsed having had a mystical experience on psilocybin, compared to those who did not, had significantly higher factor scores, indicating construct validity. The four‐factor structure was confirmed in a second sample (N = 440) and demonstrated superior fit compared to alternative models. The results provide initial evidence of the validity, reliability, and factor structure of a 30‐item scale for measuring single, hallucinogen‐occasioned mystical experiences, which may be a useful tool in the scientific study of mysticism.     

How the Bayesians got their beliefs (and what those beliefs actually are): comment on Bowers and Davis (2012)

Bowers and Davis (2012) criticize Bayesian modelers for telling "just so" stories about cognition and neuroscience. Their criticisms are weakened by not giving an accurate characterization of the motivation behind Bayesian modeling or the ways in which Bayesian models are used and by not evaluating this theoretical framework against specific alternatives. We address these points by clarifying our beliefs about the goals and status of Bayesian models and by identifying what we view as the unique merits of the Bayesian approach.     

Attentional mechanisms in learned predictiveness

Cues that reliably predict an outcome in an initial phase of training (Phase 1) are learned faster in a second phase of training (Phase 2) than cues that were unreliable in Phase 1. This result is observed despite objectively equal relationships between the cues and the outcomes in Phase 2, and consequently constitutes a nonnormative bias in learning. The present experiments sought to confirm that this learned predictiveness effect is the product of attentional processes (Experiment 1), and to test further whether these processes are under voluntary control or are automatic in nature (Experiment 2). In addition to the usual outcome prediction measure, eye-gaze behavior was also monitored. The results indicated an important role for top-down strategic attentional processes in the learned predictiveness task. In contrast, no evidence for an automatic attentional bias was found.     

Testing the efficiency of Markov chain Monte Carlo with People using facial affect categories

Exploring how people represent natural categories is a key step toward developing a better understanding of how people learn, form memories, and make decisions. Much research on categorization has focused on artificial categories that are created in the laboratory, since studying natural categories defined on high-dimensional stimuli such as images is methodologically challenging. Recent work has produced methods for identifying these representations from observed behavior, such as reverse correlation (RC). We compare RC against an alternative method for inferring the structure of natural categories called Markov chain Monte Carlo with People (MCMCP). Based on an algorithm used in computer science and statistics, MCMCP provides a way to sample from the set of stimuli associated with a natural category. We apply MCMCP and RC to the problem of recovering natural categories that correspond to two kinds of facial affect (happy and sad) from realistic images of faces. Our results show that MCMCP requires fewer trials to obtain a higher quality estimate of people's mental representations of these two categories.     

Gender,attitudes towards women,and the appreciation of sexist humor

According to the dispositional theory of humor, females should enjoy female-disparaging jokes less than male-disparaging jokes because the recipient of the disparagement in the former situation is a member of the respondent's reference group. Several studies have shown, however, that both men and women often prefer female-disparaging humor. In the present study, attitudinal disposition was measured using Spence and Helmreich's Attitudes Toward Women Scale. Participants were then asked to rate the funniness of sexist and nonsexist jokes. Although sexist jokes were, in general, rated funnier than nonsexist jokes, joke type interacted with attitudinal disposition such that males and females with less traditional views of women's roles showed reduced preference for sexist humor, compared to their more traditional counterparts.     

Maintaining disulfiram ingestion among outpatient alcoholics: a security-deposit contingency contracting procedure

Disulfiram is frequently prescribed to alcoholic patients as a deterrent to drinking. Although ingestion of ethanol by a disulfiram patient quickly results in an intense dysphonc reaction, the drug is not generally credited with significant value in alcoholism treatment (Mottin, 1973). It is suggested that most alcoholics simply stop taking the medication (Gerrein et al., 1973). and review articles conclude that motivation for abstinence is the crucial variable involved in successful disulfiram treatment (Ditman, 1966: Mottin, 1973).Motivation may be a characteristic of environmental contingencies rather than of individuals. If so, environmental contingencies should permit one to design into a disulfiram treatment progrim the requisite motivation to achieve therapeutic success. Contingency management procedures supporting disulfiram ingestion reported to date (Liebson et al., 1973: Haynes, 1973) have been of the sort to be imposed upon difficult populations rather than offered to general treatment applicants. Contingency contracting may represent a technique for supporting disulfiram ingestion appropriate to the broader general population of voluntary alcoholism treatment applicants. Contingency contract treatment (Homme, 1969; Stuart, 1971) is a procedure in which client and therapist mutually agree to establish an incentive for the client to achieve a behavioral goal. Contingency contracts can be viewed as a form of self-control therapy, and have been applied in a wide variety of problem areas, including school problems (Homme, 1969: Cantrell, et al., 1969). delinquency (Stuart, 1971),weight control (Mann, 1972). smoking reduction (Elliott and Tighe, 1968: Winett, 1973), drug abuse (Boudin, 1972), and alcoholism (Miller, 1972).Frequently contingency contracting involves the client's posting of a financial security deposit to serve as his incentive for achieving the agreed-upon therapeutic goal (Tighe and Elliot, 1968). This security deposit can be earned back consequent upon achieving specific goals, or sacrificed consequent upon failure. Controlled studies by Mann (1972) and by Winett (1973) have demonstrated this security-deposit procedure to be effective in enhancing weight loss and smoking reduction, respectively.We report here on our experience with application of the security deposit contracting procedure to maintaining routine disulfiram ingestion among outpatients in an alcoholism treatment program.     

Weapons and Eye Contact as Instigators or Inhibitors of Aggressive Arousal in Police-Citizen Interaction1

A field experiment was conducted with police officers during the normal course of their traffic patrol duties. The purpose was to determine whether the presence of holstered weapons and mirror sunglasses affected the degree of aggressiveness expressed nonverbally, and reported on a mood scale by citizens halted for an information check (neutral condition) or in order to be given a traffic ticket (negative condition). Results indicated that subjects in the negative condition both expressed and reported more aggressivity when the police officer wore a weapon than when no weapon was visible. The use of sunglasses had no effect on aggressivity but resulted in the officer's being perceived more negatively, though he was not perceived more negatively when he wore a weapon. No sex differences in expressed or reported aggressivity were obtained, although some sex differences on measures of secondary interest did occur. The implications of these findings for research on the “weapons effect” and on policy regarding the visibility of police weapons and the wearing of sunglasses by police officers are discussed.