caa a22 4500 386353093 CHVBK 20180307111840.0 cr unu---uuuuu 161130e198911 xx s 000 0 eng 10.1017/S0033291700005584 doi S0033291700005584 pii (NATIONALLICENCE)cambridge-10.1017/S0033291700005584 Filling the preparatory interval with temporal information or visual noise: crossover effect in schizophrenics and controls [Elektronische Daten] Three variants of a simple reaction time task with regular and irregular series of different preparatory intervals (Pls) were presented to schizophrenics and a control group of alcoholics and normals: the visual warning signal (WS) either (1) remained fixed, (2) shrank at a constant rate, or (3) changed in size erratically. Time information provided by shrinking WSs reduced the average reaction time in all groups and attenuated the crossover effect (COE) of schizophrenics, although even here more schizophrenics than controls had COE-scores ≥ 25 msec. Erratically changing WSs introduced the COE in controls. Within groups the COE was not related to general response speed, age, duration of hospitalization, or medication. Results are interpreted as indicating that schizophrenics eschew controlled anticipatory processes on the basis of WS- and PI-information which are crucial for motor preparation when PIs are too long to allow an automatic perceptual grouping of warning and imperative stimulus. This may also occur in controls when time estimation is impeded by distraction. Copyright © Cambridge University Press 1989 Borst Ulrike Department of Psychology, University of Konstanz, Konstanz, Federal Republic of Germany Cohen Rudolf Department of Psychology, University of Konstanz, Konstanz, Federal Republic of Germany Psychological Medicine Cambridge University Press 19/4(1989-11), 865-874 0033-2917 19:4<865 1989 19 PSM https://doi.org/10.1017/S0033291700005584 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0033291700005584 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Borst Ulrike Department of Psychology, University of Konstanz, Konstanz, Federal Republic of Germany NATIONALLICENCE 700 1- Cohen Rudolf Department of Psychology, University of Konstanz, Konstanz, Federal Republic of Germany NATIONALLICENCE 773 0- Psychological Medicine Cambridge University Press 19/4(1989-11), 865-874 0033-2917 19:4<865 1989 19 PSM CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge