Cognitive demands of error processing

This study used a dual-task methodology to assess attention demands associated with error processing during an anticipation-timing task. A difference was predicted in attention demands during feedback on trials with correct responses and errors. This was addressed by requiring participants to respond to a probe reaction-time stimulus after augmented feedback presentation. 16 participants (8 men, 8 women) completed two phases, the reaction time task only and the anticipation-timing task with the probe RT task. False feedback indicating error and a financial reward manipulation were used to increase relevance of errors. Data supported the hypothesis that error processing is associated with higher cognitive demands than processing feedback denoting a correct response. Individuals responded with quicker probe reaction times during presentation of feedback on correct trials than on error trials. These results are discussed with respect to the cognitive processes which might occur during error processing and their role in motor learning.     

Attention and expectation in human predictive learning: the role of uncertainty

Three localized, visual pattern stimuli were trained as predictive signals of auditory outcomes. One signal partially predicted an aversive noise in Experiment 1 and a neutral tone in Experiment 2, whereas the other signals consistently predicted either the occurrence or absence of the noise. The expectation of the noise was measured during each signal presentation, and only participants for whom this expectation demonstrated contingency knowledge showed differential attention to the signals. Importantly, when attention was measured by visual fixations, the contingency-aware group attended more to the partially predictive signal than to the consistent predictors in both experiments. This profile of visual attention supports the Pearce and Hall (1980) theory of the role of attention in associative learning.     

A cultural adaptation of motivational interviewing to address heavy drinking among Hispanics

Although the need for cultural adaptations is often noted in addiction research, there are few templates to guide the process. The rationale for a social contextual framework to culturally adapt motivational interviewing for an immigrant heavy drinking Latino population in the U.S. Northeast is presented. The aim of the pilot study was to obtain data on acceptability of this approach. Participant responses to the adaptation were examined qualitatively and quantitatively in a preliminary study. Participants recruited from the community met criteria for risky drinking (men, ≥5 drinks/occasion or ≥14 drinks/week; women, ≥4 drinks/occasion or ≥7 drinks/week). Participants (n = 25) who completed baseline assessments and a culturally adapted brief motivational interview (CAMI) were asked to complete a qualitative exit interview to give feedback on their interview experience. Participants reported being highly engaged with treatment (M = 3.58 on a scale of 1-4, SD = .50), and felt very satisfied with treatment (M = 3.58 on a scale of 1-4, SD = .93). Nearly all (95%) reported that understanding their culture was important to understanding their drinking behavior. Results support the acceptability and relevance of this adaptation from participants' perspectives.     

Family Involvement in Residential Treatment: Staff, Parent, and Adolescent Perspectives

We conducted interviews with staff members, parents, and adolescents at a residential treatment center to examine the frequency, nature, and satisfaction with contact between parents and adolescents and parents and staff. We also assessed perceived barriers to family involvement and possible solutions for improving this involvement. Results indicated that there is more contact between parents and adolescents than in previous studies. In addition, contact between parents and staff occurred frequently, although there were discrepancies regarding their reasons for the contact. Most parents and adolescents reported that the amount of contact was adequate, but the majority of staff members perceived there to be not enough contact. Adolescents reported that there was not enough contact with secondary sources of support, most often other family members. Barriers to family involvement included transportation, parent responsibilities and personal problems, and legal issues. In addition, parents reported that strained family relationships and problematic adolescent behavior interfered with their involvement. The need for residential treatment centers to broaden services to include parents as well as members of the larger support network is discussed.     

Alcohol seeking by rats: Action or habit?

In two experiments, we examined the relative susceptibility to outcome devaluation of lever pressing by rats for either a 10% ethanol solution or food pellets. The rats were trained to press different levers for these two reinforcers using a sucrose-substitution procedure. An aversion was then conditioned from either the ethanol solution or the food pellets by pairing consumption with illness induced by lithium chloride. When instrumental performance was subsequently tested in extinction, the rats pressed less on the pellet lever if the pellets, rather than the ethanol, had been devalued by aversion conditioning. By contrast, performance on the ethanol lever was unaffected by whether the ethanol or pellets were devalued. Moreover, noncontingent presentations of the devalued reinforcer had no impact on test performance. The differential resistance to outcome devaluation suggests that, in contrast to food seeking, alcohol seeking is a stimulus-response habit rather than a goal-directed action mediated by a representation of the action-outcome contingency.     

Stimulus-outcome interactions during instrumental discrimination learning by rats and humans

The associative structure mediating goal-directed action was investigated using congruent and incongruent conditional discriminations. The stimulus was the same as the outcome in each component of the congruent discriminations, whereas the stimulus of one component of the incongruent discriminations was the same as the outcome of the other component. Humans, but not rats, learned the congruent discrimination more rapidly than the incongruent discrimination, a difference that the authors attribute to the fact that outcome-response associations caused response conflict in the incongruent discrimination. Moreover, responding was resistant to outcome devaluation following incongruent, but not congruent, training, suggesting that both humans and rats adopted a stimulus-response strategy to resolve the incongruent discrimination.     

Episodic memory: what can animals remember about their past?

The question of whether episodic memory, the ability to recall unique, personal experiences, is restricted to humans is a matter of current controversy. Recent work on food-storing jays suggests that several features of episodic memory may not be as exclusive to humans as previously thought. In this review we outline the critical features of episodic memory in humans, its relationship to declarative memory, and recent results revealing that jays can learn to perform a task that depends on certain features of episodic memory and can thus be considered 'episodic-like'. Finally, we compare this avian performance with a contemporary definition of human episodic memory and consider the implications for studies of hippocampal function and animal cognition.     

Motivational control of instrumental performance: The role of prior experience of the reinforcer

In four experiments we investigated the conditions that are necessary for instrumental performance to adjust appropriately to a change in drive state. Rats were trained to press a lever and pull a chain concurrently, with one action being reinforced by sucrose solution and the other by food pellets. In Experiment 1 for animals that were hungry throughout training the rate of lever pressing in an extinction test under thirst was unaffected by the type of reinforcer produced by this action during training, even though the sucrose solution would maintain a higher rate than the food pellets during training under thirst. In contrast, animals that experienced the instrumental contingencies arranged by the concurrent schedule while thirsty at some point during training pressed the lever more during the extinction test under thirst when this action had been reinforced with the sucrose solution rather than the food pellets. The remaining three experiments demonstrated that for this incentive effect to occur it is sufficient that the sucrose solution be delivered non-contingently under thirst at some stage of training. Thus, it would appear that performance mediated by an instrumental contingency adjusts appropriately to reinforcer revaluation brought about by a drive shift only if the animals have had prior experience with the incentive under the test drive state. This observation was interpreted in terms of Tolman's “cathexis” theory of motivation.