In Studies 1 and 2, the authors evaluated deliberate practice theory through analyses of the relationship between practice and performance for 2 populations of athletes: triathletes and swimmers, respectively. In Study 3, the authors obtained evaluations of practice from athletes' diaries. Across athletes, length of time involved in fitness activities was not related to performance. For the triathletes, a significant percentage of variance in performance was captured by practice. This was not so for sprint events for the swimmers, in which gender was a significant predictor. In the diaries, physical activities were perceived as enjoyable. In contrast to the results obtained from questionnaires, enjoyment did not covary with an activity's relevance to improving performance. Although these findings highlight the importance of sport-specific practice, the authors question a domain-independent account of expertise based on deliberate practice.

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Increased levels of routinised and compulsive-like behaviours were shown by individuals with Down syndrome of all ages, were not associated with mental health problems, but were associated with worries and fears. Factor analysis found three factors, two of which (Just right and Repetitive behaviours), were similar to those identified in typically developing samples. This suggests that the behaviours have similar adaptive functions in individuals with developmental delays.

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Background: Routinized and compulsive-like behaviours are very common in young children; however, previous studies have shown inconsistent results as to the age such behaviours decline. Another issue concerns any association with later Obsessive-Compulsive Disorder (OCD). Method: Related measures longitudinal design: We compared parent ratings of children over a 6 year period. The sample consisted of 109 children (aged 8 to 18 years, 62 males). Measures were of routinized and compulsive-like behaviours, OCD behaviours, worries and fears. Results: Routinized behaviours decreased significantly over the 6 year period, but not for children reported to have difficulties. OCD behaviours increased significantly with 31% of the sample having above threshold scores; however, only one child in the sample had an OCD diagnosis. There were significant correlations between CRI, OCD and fear and worry scores. Conclusion: We confirmed the view that anxiety reduction is one of the functions of routinized behaviours. A small number of children had high scores on routinized behaviours and the OCD measure, but there was only 1 diagnosis of OCD in the sample. This suggests that they may be part of the typical distribution of such behaviours.