The purpose of this study was to use stimulus equivalence technology to teach emotion recognition skills to three adults with acquired brain injuries. A pre-test, post-test design was employed to test for acquisition of the facial recognition skills after training. Computer presentation of the stimuli was used. A pre-test was conducted, in which participants' abilities to expressively label facial representations of emotions and match distinct representations of emotions to other representations depicting the same emotion were examined. Next, participants received matching-to-sample training, in which they were first taught to receptively identify the facial representations of the basic emotions happiness, sadness and anger. They were then taught to receptively identify facial representations of those same emotions that were different from the first representations. When mastery criterion was attained, a post-test identical to the pre-test was presented. Results showed that the participants were able to demonstrate increased facial-emotional recognition skills after training.
The present paper describes two studies in which participants with and without acquired brain injuries were compared on a temporal discounting task involving various hypothetical amounts of money available at varying delay values. During Experiment 1, both groups of participants were presented with choices between amounts of money ranging from 1 to 1000 US dollars at delays from 1 week to 10 years. The results obtained from this procedure were consistent with previous models of temporal delay discounting for control group participants, yet not for the majority of the participants with acquired brain injuries. During Experiment 2, adjustments in hypothetical amounts and delays were made whereby the amounts of money ranged from 1 to 20 US dollars at delays from 1 day to 1 year. These manipulations yielded data generally consistent with temporal delay discounting models previously reported in the published literature. The utility of using delay discounting procedures as a means of assessing impulsivity in persons with acquired brain injuries is presented.
We investigated the effects of a concurrent physical therapy activity (keeping the hand open) during delays to reinforcement in an adult man with acquired brain injuries. Once a relatively stable level of hand-open behavior was obtained, the participant was asked to choose between a small immediate reinforcer and a larger delayed reinforcer contingent on keeping the hand open at greater-than-baseline duration. Afterwards, the participant was asked to select between a larger delayed reinforcer with no hand-open requirement and the identical larger delayed reinforcer with a progressively increasing hand-open requirement. Results suggest a shift in preference to larger delayed reinforcers and an eventual preference for the hand-open requirement option.
The following paper will detail demographic information about alcohol and substance abuse issues in the acquired brain injury (ABI) population. Included in such a review will be a systematic presentation of the current data on the incidence of such issues as well as a comprehensive treatment model with outcome data provided. Pre- and post-test measures of separate functional outcome areas were employed to assess the effects of the treatment package. The paper will document the core elements of a substance abuse treatment programme that is based upon community inclusion and positive, proactive treatment methods in facilitating decreases in substance abuse behaviour. The programme employed a host of individual and group session protocols specifically targeted at education and self-monitoring of behaviour in order to facilitate more effective self-control of addictive behaviours. The positive outcomes achieved by the participants involved in the study provide clinical justification for a proactive behavioural approach to substance abuse in the ABI population.
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