{"value"=>"<p> <span class=\"title\">Rhythmical Structure and Duration Experience in the Perception of Environmental Input</span></p> <p>In order to determine the effect of rhythmical structure on the subjective duration experience and subsequent recognition of patterned sequential stimuli, duration estimates and recognition responses were recorded during the presentation of an audio tape of varying sequences of patterned percussive beats. The independent variables were pattern level and accent placement. Ten subjects listened to a presentation series of six sequence conditions and recorded subjective duration estimates of the intervals of the sequences and were subsequently presented with a recognition series of the same six sequences randomized with nine control sequences for which recognition responses were recorded in a 3 × 2 design. Pattern level was differentially effective on both dependent measures, depending on the presence or absence of account placement. Repeating patterned sequences were judged shorter and recognized better when accent placement was included than when it was not. The results were interpreted to support the supposition that rhythmical patterning of presented sequences of events effectively reduces the subjective duration experience of the presentation interval for those sequences as well as the structural complexity of the sequences. Implications for the diagnosis and treatment of autism were drawn form the hypothesized interaction of rhythmical structure, sequence complexity and duration experience.</p>"}