Doubts about double dissociations between short- and long-term memory

Historically, psychologists and neuroscientists have distinguished between processes supporting memory for events across retention delays of several seconds (short-term memory, STM), and those supporting memory for events across longer retention delays of minutes or more (long-term memory, LTM). Dissociations reported in some neuropsychological studies have contributed to a popular view that there must be neurally distinct memory stores that differentially support STM and LTM. In this article, we review evidence from recent studies regarding dissociations between STM and LTM. We suggest that the evidence reveals problems with claims of selective STM or LTM impairments, which in turn questions whether theories of memory need to propose neurally distinct stores for short- and long-term retention. We consider alternative ways to explain the neural mechanisms of memory across different retention intervals.     

The local organization of behavior: dissociations between a pigeon's behavior and self-reports of that behavior

The purpose of the experiment was to study the relation between what an organism does in a setting that demands temporal patterning of behavior and what it reports it has done. More specifically, a pigeon produced two classes, shorter and longer, of temporal patterns of key pecks (interresponse times) on a center key. Occasionally, a symbolic matching-to-sample probe arranged on side keys asked the pigeon whether its most recent pattern was a shorter or longer one. The longer reinforced pattern was always three times as long as the shorter one and the two patterns were reinforced equally often. Absolute duration of reinforced patterns was varied. In some conditions, interresponse-time distributions on the center key were bimodal, indicating a clear behavioral adaptation to the contingency, yet a bird did not report very well by appropriate side-key responding what its most recent interresponse time had been. In other conditions, the interresponse-time distributions were less clearly bimodal, yet a bird reported more accurately its previous interresponse time as shorter or longer. Thus, there was a dissociation between how well behavior on the center key conformed to the schedule requirement and how well a bird reported what it was doing on the center key. In addition, as absolute duration of the reinforced patterns was increased, a bird categorized its most recent pattern less well even as its preference for the shorter pattern increased dramatically. These results were interpreted as an example of the phenomenon of dissociation between tacit knowledge and knowledge.     

Re-representing consciousness: dissociations between experience and meta-consciousness

A distinction is drawn between non-conscious (unexperienced), conscious (experienced), and meta-conscious (re-represented) mental processes. There is evidence for two types of dissociations between consciousness and meta-consciousness, the latter being defined as the intermittent explicit re-representation of the contents of consciousness. Temporal dissociations occur when an individual, who previously lacked meta-consciousness about the contents of consciousness, directs meta-consciousness towards those contents; for example, catching one's mind wandering during reading. Once meta-consciousness is triggered, translation dissociations can occur if the re-representation process misrepresents the original experience, such as when one verbally reflects on non-verbal experiences or takes stock of subtle or ambiguous experiences.     

Functional dissociations in temporal preparation: Evidence from dual-task performance

Implicit preparation over time is a complex cognitive capacity important to optimize behavioral responses to a target occurring after a temporal interval, the so-called foreperiod (FP). If the FP occurs randomly and with the same a priori probability, shorter response times are usually observed with longer FPs than with shorter ones (FP effect). Moreover, responses are slower when the preceding FP was longer than the current one (sequential effects). It is still a matter of debate how different processes influence these temporal preparation phenomena. The present study used a dual-task procedure to understand how different processes, along the automatic-controlled continuum, may contribute to these temporal preparation phenomena. Dual-task demands were manipulated in two experiments using a subtraction task during the FP. This secondary task was administered in blocks (Experiment 1) or was embedded together with a baseline single-task in the same experimental session (Experiment 2). The results consistently showed that the size of the FP effect, but not that of sequential effects, is sensitive to dual-task manipulations. This functional dissociation unveils the multi-faceted nature of implicit temporal preparation: while the FP effect is due to a controlled, resource-consuming preparatory mechanism, a more automatic mechanism underlies sequential effects.     

Rewarded remembering: dissociations between self-rated motivation and memory performance

People often claim that they perform better in memory performance tasks when they are more motivated. However, past research has shown minimal effects of motivation on memory performance when factors contributing to item-specific biases during encoding and retrieval are taken into account. The purpose of the present study was to examine the generality of this apparent dissociation by using more sensitive measures of experienced motivation and memory performance. Extrinsic motivation was manipulated through competition instructions, and subjective ratings of intrinsic and extrinsic motivation were obtained before and after study instructions. Participants studied a series of words, and memory performance was assessed by content recall (Experiment 1) and source recall (Experiment 2). Both experiments showed dissociation between subjective ratings of extrinsic motivation and actual memory performance, so that competition increased self-rated extrinsic motivation but had no effects on memory performance, including source recall. Inconsistent with most people's expectations, the findings suggest that extrinsic motivation has minimal effects on memory performance.     

Neuropsychological dissociations between priming and recognition: a single-system connectionist account

A key claim of current theoretical analyses of the memory impairments associated with amnesia is that certain distinct forms of learning and memory are spared. A compelling example is that amnesic patients and controls are indistinguishable in repetition priming but amnesic patients are impaired at recognizing the study items. The authors show that this pattern of results is predicted by a single-system connectionist model of learning in which amnesia is simulated by a reduced learning rate. They also demonstrate that the model can reproduce the converse pattern in which priming but not recognition is impaired if the input is assumed to be additionally degraded in a priming test. The authors conclude that dissociations between priming and recognition do not require functionally or neurally distinct memory systems.     

Beyond pleasure: emotion activity affects the relationship between attitudes and behavior

The research examined an additional proposed moderator of the attitude-behavior relationship: the activity level of emotions associated with an attitude object. In Experiment 1, participants who self-generated active rather than passive emotions as being associated with gay men displayed greater attitude-behavior consistency in hiring recommendations for a gay job applicant, as did participants who rated active rather than passive experimenter-provided emotions as being associated with gay men. In Experiment 2, participants who were instructed to associate active rather than passive emotions with gay men subsequently displayed greater attitude-behavior consistency in similar hiring recommendations. It is suggested that future research on the affective component of attitudes might benefit from going beyond consideration of whether the associated emotions entail displeasure or pleasure.     

Affordances can invite behavior: Reconsidering the relationship between affordances and agency

The concept of agency has been central to ecological approaches to psychology. Gibson, one of the founders of this movement, made room for this concept by arguing against the mechanistic conceptions in psychology. In his view, the environment is not a collection of causes that pushes the animal around, but consist of action possibilities, which he coined affordances. In making their way in the world, animals regulate their behavior with respect to these possibilities. Reed later developed this ecological conception of agency, following Gibson in conceiving of affordances as action possibilities. However, drawing upon industrial design, architecture, and phenomenology, we argue that affordances are not mere action possibilities but that they can also invite behavior. We suggest a mutualist perspective on invitations, suggesting that they depend on the animal-environment relationship in multiple dimensions. The implications of this new conception of affordances for the ecological account of agency are explored.     

The relationship between cheating behavior and sensation-seeking

Academic dishonesty is a problem in academia and cheating is a problem in society at large. Sensation-seeking was proposed as a personality trait that is positively related to one’s likelihood to cheat. A sample of 105 undergraduates participated in a research activity for course credit where cheating on a trivia game to win a cash prize by taking answers from a sealed folder was an option. As anticipated, sensation-seeking predicted cheating. Consistent with previous research, males were also more likely to cheat than females. Targeted interventions are suggested as a possible remedy.     

The relationship between commitment and exercise behavior

Objectives: The purpose of this study was to examine the relationship between commitment and exercise behavior using the Sport Commitment Model (SCM; J Sport & Exercise Psychology, 15, 1) as a guiding conceptual framework.Design: Cross-sectional survey.Methods: Participants at two universities (N₁=205; 83.4% female; N₂=223; 73.1% female) provided demographic information and completed measures of exercise commitment and frequency of exercise behavior.Results: Exploratory and confirmatory factor analyses supported the presence of 5 determinants (personal investments, social support, satisfaction, social constraints, and invovlement alternatives) and 2 dimensions (‘want’ and ‘have’) of commitment. Structural equation modeling analyses supported the predictive utility of the SCM accounting for 31% and 51% of the commitment dimension variance and 12% of the exercise behavior variance respectively. Satisfaction and personal investment predicted both commitment dimensions, whereas alternatives and social constraints predicted ‘have to’ commitment only, and the ‘want to’ commitment dimension was the only significant predictor of exercise behavior.Conclusion: These results render some support for the psychometric properties of the measures used to assess commitment constructs in the exercise domain and provide partial support for the application of the SCM to the study of exercise motivation issues.     

厌恶情绪与自杀行为的关系

自杀导致人类死亡的人数与日俱增,然而自杀的心理机制却并不清楚。最近研究发现,厌恶情绪是导致自杀的主要情绪因素,个体因为自身厌恶而走向自杀。厌恶情绪是一种对自己和他人排泄物等反感的基本情绪,促进个体远离毒性和疾病,从而产生“免疫行为”。许多心理问题来自于对周围人或事物的厌恶,有自杀行为的个体对自身极其厌恶,说明他们的厌恶情绪出现了问题。如同躯体免疫攻击自身一样,自身厌恶是自杀意念的关键因素,早年创伤是其根源,生活压力和精神疾病也参与厌恶诱发自杀意念。厌恶诱发自杀意念的神经基础与HPA轴和五羟色胺系统有关。未来研究可利用神经影像和电生理等神经科学技术,检验自杀行为的神经机制,探讨厌恶情绪影响自杀行为的心理和神经机制。     

The relationship between cheating behavior and sensation-seeking

Academic dishonesty is a problem in academia and cheating is a problem in society at large. Sensation-seeking was proposed as a personality trait that is positively related to one’s likelihood to cheat. A sample of 105 undergraduates participated in a research activity for course credit where cheating on a trivia game to win a cash prize by taking answers from a sealed folder was an option. As anticipated, sensation-seeking predicted cheating. Consistent with previous research, males were also more likely to cheat than females. Targeted interventions are suggested as a possible remedy.     

Sit-to-stand: Functional relationship between upper body and lower limb segments

The behaviour of linked body segments during sit-to-stand was the subject of this study which investigated the relationship between the trunk and lower limb segments by varying the initial position of the trunk. Six subjects were videotaped as they stood up with feet on a forceplate from three initial positions: erect sitting, trunk flexed forward 30 deg, and 60 deg. When subjects actively flexed the trunk in the pre-extension phase, the order in which lower limb joints extended was knee, hip, ankle. However, when there was no active flexion, the order of onsets changed, the hip extending first followed by the knee and ankle. An extensor support moment (SM), a summation of extensor moments at hip, knee and ankle, occurred throughout the extension phase. The mean peak value of SM remained invariant in all three conditions despite variability in individual hip, knee and ankle moments. When active trunk flexion was absent, the duration of the extension phase was longer and a high value of SM was sustained for a longer proportion of the phase, indicating that more muscle force was required. The findings support the view that biomechanical characteristics emerge naturally from a functional coupling between segments, according to the demands of the action.     

All together now: when dissociations between knowledge and action disappear

Why do people sometimes seem to know things but fail to act appropriately on the basis of this knowledge? Such dissociations between knowledge and action often occur in infants and children, and in adults following brain damage. These dissociations have supported inferences about the organization of cognitive processes (e.g., separable knowledge and action systems) and their development (e.g., knowledge systems develop before action systems). The current study tested the basis for knowledge-action dissociations in a card-sorting task in which children typically correctly answer questions about sorting rules while sorting cards incorrectly. When questions and sorting measures were more closely equated for the amount of conflict that needed to be resolved for a correct response, children showed no systematic dissociation between knowledge and action. The results challenge standard interpretations of knowledge-action dissociations and support an alternative account based on graded knowledge representations.     

The relationship between medicine's internal morality and religion.

In the face of managed care and market economies infringing on the practice of medicine, reducing its autonomy and determining the moral guidelines for medical practice, many physicians are calling out for a return to what is perceived as a traditional medical ethic. Many religiously motivated critics of certain modern developments in medicine have made similar appeals. These calls are best understood as an attempt to define medicine as a practice that is necessarily ethical in nature, a practice the moral basis of which is internal to that practice. This article examines and assesses this definition of medicine in reference to Aristotle's division of human undertakings into three distinct categories: theory, poieisis (i.e., production), and praxis. It is concluded that medicine can be understood as a praxis (as opposed to a theory or production, both of which are morally neutral), because the practice of medicine, and all of its constitutive acts, can only be explained and assessed in reference to health, which is itself a final good and hence of moral value. Such an understanding would immunize medicine against usurpation by the free market. However, by the same token it would also dissociate medicine from all other moralities external to it, including those grounded in faith and religion.     

Experimental dissociations between memory measures: Influence of retrieval strategies

The objective of this study was to explore the participants’ processing strategies on the mere exposure effect, object decision priming and explicit recognition. In Experiments 1, we observed that recognition and the mere exposure effect for unfamiliar three-dimensional objects were not dissociated by plane rotations in the same way as recognition and object decision priming. However, we showed that, under identical conditions, prompting analytic (part-based) processing at testing produced a large plane rotation effect on recognition and the mere exposure effect similar to that observed for object decision priming (Experiment 2). Furthermore, inducing a non-analytic (whole-based) processing strategy at testing produced a reduced plane rotation effect on recognition and object decision (Experiments 3 and 4), similar to that observed for the mere exposure effect. These findings suggest that participants’ processing strategies influence performance on the three tasks.     

A meta-analysis of the relationship between organizational citizenship behavior and counterproductive work behavior

Job performance is increasingly being seen to encompass constructs such as organizational citizenship behavior (OCB) and counterproductive work behavior (CWB). To clarify the OCB-CWB relationship, a meta-analysis was conducted. Results indicate a modest negative relationship (p = -0.32). The relationship strength did not increase appreciably when the target of the behavior (the organization vs. other employees) was the same. Moreover, OCB and CWB exhibited somewhat distinct patterns of relationships with antecedents. The OCB-CWB relationship was moderated by the source of the ratings, the presence of antithetical items, and the type of response options. An employee-centric perspective is proposed whereby both OCB and CWB are perceived as adaptive behavior. Implications for organizations are discussed.     

The relationship between the assertive behavior of parents and the behavior of their children

Abstract

This investigation attempted to measure the relationship between parents' and their children's assertive and interpersonal behavior in order to identify the family population which can best profit from interpersonal skills training. Subjects were 60 volunteer mothers and fathers and 95 children, ages six to twelve, from a white upper socio-economic suburban population. The adult assessment measures were Fundamental Interpersonal Relations Orientation-Behavior (FIRO-B) and the Adult Self-Expression Scale. The child assessment measures were Fundamental Interpersonal Relations Orientation-Behavior Children (FIRO-BC) and Self-Expression Scale: Children. The most notable result of this study indicates that contrary to most published literature on the family, assertiveness relates to affection rather than control; that assertiveness training should be subordinated to interpersonal skills training; that the FIRO instruments provide a more effective assessment of family interaction than do assertiveness instruments.