Loss of control by a less valid or by a less salient stimulus compounded with a better predictor of reinforcement

An unsalient stimulus, or one imperfectly correlated with reinforcement, may acquire significant control over responding, provided that it is the only available signal for reinforcement, but may fail to acquire control if it is reinforced only in conjunction with a second, more salient or more valid stimulus. A stimulus imperfectly correlated with reinforcement may also lose control over responding if having initially been reinforced in isolation, it is subsequently reinforced only in conjunction with another, more valid stimulus. If the effects of relative salience are to be explained in exactly the same way as those of relative validity, we should expect a similar loss of control by an unsalient stimulus, A, if, after initial consistently reinforced trials to A alone, subjects subsequently receive reinforcement only in the presence of a compound stimulus, A + B. Two experiments on discrete-trial discrimination learning in pigeons and one on conditioned suppression in rats confirm this expectation. The results have implications for theories of selective association in conditioning and discrimination learning.     

Contrast effects on the auditory evoked response and its relation to psychophysical judgments

An auditory average evoked response (AER) procedure was used to search for a physiological counterpart of the contrast effect-the tendency for a S’s judgment of the intensity of a stimulus to be modified by the intensity of prior stimulation. When a tone was preceded by a softer tone, its AER amplitude increased; conversely, when a tone followed a louder tone, amplitude decreased. Irregular intervals between tones decreased the AER contrast effect, as did increasing the interval between tones. Further, significant correlations were found between individual scores on the AER contrast procedure and performance on a battery of psychophysical tasks.     

Demand awareness, subject sophistication, and the effectiveness of a verbal "reinforcement"

A cognitive or problem-solving interpretation of verbal conditioning was extended by making explicit the role of demand awareness and cooperation motivation in mediating the behavior. It was found that the word “reinforcement” itself was effective in producing verbal conditioning, and as predicted there was a highly significant difference between subjects who had taken a course in psychology and those who had not Postexperimental measures of contingency awareness, demand awareness and cooperation motivation all correlated with experimental performance That the strongest association was obtained when demand awareness plus cooperation motivation were considered was interpreted as indicating the crucial importance of these variables in mediating so-called verbal conditioning Data were interpreted as questioning the appropriateness of using the concepts of instrumental appetitive conditioning to describe so-called verbal conditioning. The effect seems to be an artifact of subjects cooperating with experimental demand characteristics     

Recognition failure of words with a single meaning

Recognition failure of recallable words was demonstrated with single-meaning target words after a 7-day retention interval. When overall levels of recognition were equated, the magnitude of the effect was the same as that observed with high-frequency words of multiple meanings in other experiments. It was concluded that, contrary to suggestions of Reder, Anderson, and Bjork (1974), encoding specificity is not limited to words that have several semantic senses. The experiment also provided evidence contrary to the hypothesis that recall of unrecognized items comes about because of additional learning opportunities afforded by the recognition test.     

Impact of the format of user instructions on the handling of a wrist blood pressure monitor

Cognitive Processing - Few studies have focused on procedural documents in the field of home medical devices, although incorrect use and usability problems can have important consequences for the...     

Leader–Member Exchange (LMX) and Performance: A Meta‐Analytic Review

This paper reports a meta‐analysis that examines the relationship between leader–member exchange (LMX) relationship quality and a multidimensional model of work performance (task, citizenship, and counterproductive performance). The results show a positive relationship between LMX and task performance (146 samples, ρ = .30) as well as citizenship performance (97 samples, ρ = .34), and negatively with counterproductive performance (19 samples, ρ = ?.24). Of note, there was a positive relationship between LMX and objective task performance (20 samples, ρ = .24). Trust, motivation, empowerment, and job satisfaction mediated the relationship between LMX and task and citizenship performance with trust in the leader having the largest effect. There was no difference due to LMX measurement instrument (e.g., LMX7, LMX‐MDM). Overall, the relationship between LMX and performance was weaker when (a) measures were obtained from a different source or method and (b) LMX was measured by the follower than the leader (with common source‐ and method‐biased effects stronger for leader‐rated LMX quality). Finally, there was evidence for LMX leading to task performance but not for reverse or reciprocal directions of effects.     

Gendered Patterns of Interaction: A Foucauldian Discourse Analysis of Couple Therapy

In recent years, there has been a rapid increase in attention to gender and gender-based inequalities in family therapy. Despite this, there is a dearth of empirical work that examines how gendered inequalities intersecting with other axes of privilege/oppression are maintained within families, including in the therapeutic context. In this study, we used Foucauldian discourse analysis to examine how gendered power is produced and reproduced circularly or through recurrent patterns of interaction in couple therapy. We identified gendered discourses and assumptions informing partners’ constructions of their gendered selves and relationships. We highlight the complexity and intersectionality of gendered subjectivities and relations in contemporary Canadian couples involved in heterosexual relationships. Although women in this study contest their oppression and exhibit agency to negotiate who they are in general and in relation to men, they simultaneously continue to occupy subordinate positions in a gender order that is culturally and interactionally allocated to them. We discuss implications for family therapy practice.     

Impact of outpatient non-myeloablative haematopoietic stem cell transplantation in quality of life vs. conventional therapy

The role of outpatient hematopoietic stem cell transplantation (HSCT) as a therapeutic tool has been strengthened significantly because of the increasing number of patients undergoing this treatment. Due the very nature of this procedure, one of the aspects that should not be overlooked is the quality of life (QOL) of patients undergoing HSCT. Thus, one must consider not only health status after treatment, but also, the psychosocial implications for the patient. This is an observational, longitudinal, and prospective study to assess QOL in patients undergoing outpatient HSCT vs. similar patients receiving medical treatment (MxTx). By applying the COOP/WONKA charts on five occasions (pre-HSCT/initial, post-HSCT/first month, and at 3, 6, and 9 months), thirty-eight patients were analysed, 19 with HSCT and 19 with MxTx with no differences in age, gender or diagnosis. The initial survey found significant differences only in pain perception, which was higher in the HSCT group (p = .08); at the first month, there was a greater tendency for feelings of depression or anxiety in the HSCT group (p = .016), with more limitations in social (p = .003) and daily (p = .044) activities. From 3 months post-HSCT, the results were very similar. The differences persisted only in the area of social activities. Four patients developed graft-versus-host disease with no significant difference in the scores obtained compared to other transplant patients at 3, 6, and 9 months (p = .26) of follow-up.     

Nigerian Clergy and healthcare professionals’ perceptions of health-seeking behaviours among Nigerian immigrants in the UK

The diversity in patient populations due to immigration in the UK has implications for adequate understanding of a patients’ culture by the clinician as well as patient–clinician cultural matching for enhanced service use and outcome. This qualitative study investigated how Nigerian clergy and health professionals perceived health-seeking behaviours among Nigerians in the UK, while considering the impact of their own beliefs and values as care providers. Six participants were interviewed (clergy, n?=?2; health professionals, n?=?4). Data were analysed using Interpretative Phenomenological Analysis. Results showed that the clergy and health professionals themselves use religious/cultural cure and formal healthcare methods, and believed Nigerian immigrants as predominantly using religious/cultural methods which can affect healthcare utilisation, although differences between the professionals were reported. The potentials for integrating other cure methods into the formal healthcare services were considered, while highlighting the challenges that may arise from such collaborative effort.