Associative learning and elemental representation: II. Generalization and discrimination

This paper follows on from an earlier companion paper (McLaren & Mackintosh, 2000), in which we further developed the elemental associative theory put forward in McLaren, Kaye, and Mackintosh (1989). Here, we begin by explicating the idea that stimuli can be represented as patterns of activation distributed across a set of units and that different stimuli activate partially overlapping sets (the degree of overlap being proportional to the similarity of the stimuli). A consequence of this view is that the overall level of activity of some of the units representing a stimulus may be dependent on the nature of the other stimuli present at the same time. This allows an elemental analysis in which provision for the representation of configurations of stimuli is made. A selective review of studies of generalization and discrimination learning, including peak shift, transfer along a continuum, configural discrimination, and summation, suggests that the principles embodied in this class of theory deserve careful consideration and will form part of any successful model of associative learning in humans or animals. There are some phenomena that require an elemental/associative explanation.     

On being lonely: fear of one's own aggression as an impediment to intimacy

This paper considers loneliness from the point of view of compromise formation and the development of fantasy as a means of defending against painful affect. Our idea is that at least one strand of loneliness derives from longing for an ideal object with whom one would never have to feel aggression and from whom no aggressive actions would have to be tolerated. The development of such a fantasy in a middle-aged man is traced to early loss of a parent with missed mourning, and is shown to be ameliorated by psychoanalytic treatment that allowed the mourning to take place.     

Evaluating the effectiveness of employee assistance programmes: a systematic review

The rapid growth of employee assistance Programmes (EAPs) has not been matched by the accompanying research base of their efficacy. Given the inconsistent information relating to the effectiveness of EAPs in enhancing employee and organizational outcomes, the present review systematically appraised available evidence from organizational psychology and business databases and grey literature sources. A total of 17 studies examining the impact of EAPs, met the inclusion criteria. These were mostly from North America and utilized quantitative methodology and pre- and post-intervention designs. The majority of studies focused on EAPs offered by external providers and the counselling service, with the most common limitations being discrepancies in variable definitions and an absent comparable control group. Overall, this review found that utilizing EAPs enhanced employee outcomes, specifically improving levels of presenteeism and functioning. Absenteeism was most commonly investigated but produced mixed results. Presenteeism demonstrated a stronger effect size and greater improvement than absenteeism, suggesting presenteeism as a better variable for assessing EAP effectiveness. This review clarified parameters of existing evidence and highlighted the narrow range of measures used to date, omitting important constructs such as health and well-being and productivity. A broader evaluation capturing a wider range of variables is urgently needed.     

Associations Between the Rotter Incomplete Sentences Blank and Measures of Personality and Psychopathology

The Rotter Incomplete Sentences Blank (RISB; Rotter, Lah, & Rafferty, 1992) is a sentence completion test intended to detect psychological maladjustment. To investigate the construct validity of the measure, we investigated what aspects of personality and psychopathology are correlated with the RISB and also tested the incremental validity of the RISB in a combined sample of clinical (n = 72) and undergraduate participants (n = 69). Interrater reliability of the RISB was good (intraclass correlation > .80). The RISB overall adjustment score discriminated between clinical and undergraduate participants, and high scores on the RISB were associated with higher negative affect, more anxiety and depression, irrational thinking, and interpersonal problems. The incremental validity of the RISB was modest, but it did explain variance in satisfaction with life and personality disorder symptoms above and beyond an extracted measure of general psychological distress. Our findings support the construct validity of the RISB.     

State‐Trace Analysis: Dissociable Processes in a Connectionist Network?

Some argue the common practice of inferring multiple processes or systems from a dissociation is flawed (Dunn, 2003). One proposed solution is state‐trace analysis (Bamber, 1979), which involves plotting, across two or more conditions of interest, performance measured by either two dependent variables, or two conditions of the same dependent measure. The resulting analysis is considered to provide evidence that either (a) a single process underlies performance (one function is produced) or (b) there is evidence for more than one process (more than one function is produced). This article reports simulations using the simple recurrent network (SRN; Elman, 1990) in which changes to the learning rate produced state‐trace plots with multiple functions. We also report simulations using a single‐layer error‐correcting network that generate plots with a single function. We argue that the presence of different functions on a state‐trace plot does not necessarily support a dual‐system account, at least as typically defined (e.g. two separate autonomous systems competing to control responding); it can also indicate variation in a single parameter within theories generally considered to be single‐system accounts.     

The Home-Based Occupational Therapy Intervention in the Alzheimer's Disease Multiple Intervention Trial (ADMIT)

There is no way to prevent functional declines related to Alzheimer's Disease (AD). The use of occupational therapy (OT) has been shown to be successful in managing some aspects of AD. We added home-based OT to evidence-based best practice for AD with the aim of delaying functional decline in people with AD. OT was delivered in the home to a caregiver dyad including the person with AD and her/his caregiver. This article describes the OT intervention for the AD Multiple Intervention Trial, a parallel randomized controlled trial. We include baseline data on the 180 caregiver dyads.     

The Development of Family Therapy and Systemic Practice in Europe: Some Reflections and Concerns

This paper outlines the development of pan European systemic thinking and practice. This development has been enabled and supported with the establishment of the European Family Therapy Association (EFTA). EFTA has evolved over the last decade from an organisation of individual members to an organisation of organisations—representing also national associations of family therapy and family therapy training institutes across 28 European countries. There are three sections to this paper: (1) a brief summary of the development of family therapy practice in Europe; (2) a brief summary of the work of the national associations of family therapy in EFTA; and (3) a brief summary of current concerns of some senior family therapists and family therapy trainers within the EFTA organisation.     

Learned associability and associative change in human causal learning.

The Mackintosh (1975) model of associative learning specifies that processing of both the cues presented on a trial and the outcome of that trial will interact to determine the amount of associative change undergone by a given cue. Experiments looking at the distribution of associative change among the elements of a reinforced compound in animal conditioning studies indicate that processing of the outcome of a trial does indeed influence associative change. The work reported here investigates the distribution of associative change among the elements of a reinforced compound in a human causal judgement paradigm, and it indicates that processing of the cues presented on a trial also plays a role in determining associative change (in terms of changes in the associability of cues as a result of experience). Taken in combination, these results provide good support for Mackintosh (1975) and the characterizations of both cue and outcome processing that it offers.