TY  - JOUR
A1  - Oberauer, Klaus
A1  - Kliegl, Reinhold
T1  - Simultaneous cognitive operations in working memory after dual-task practice
N2  - The authors tested the hypothesis that with adequate practice, people can execute 2 cognitive operations in working memory simultaneously. In Experiment 1, 6 students practiced updating 2 items in working memory through 2 sequences of operations (1 numerical, 1 spatial). In different blocks, imperative stimuli for the 2 sequences of operations were presented either simultaneously or sequentially. Initially, most participants experienced substantial dual-task costs. After 24 sessions of practice, operation latencies for simultaneous presentation were equal to the maximum of times for the 2 operations in the sequential condition, suggesting perfect timesharing. Experiment 2 showed that a reduction of dual-task costs requires practice on the combination of the 2 updating tasks, not just practice on each individual task. Hence, the reduction of dual-task costs cannot be explained by shortening or automatization of individual operations
Y1  - 2004
SN  - 0096-1523
ER  - 
TY  - GEN
A1  - Rolfs, Martin
A1  - Kliegl, Reinhold
A1  - Engbert, Ralf
T1  - Microsaccade orientation supports attentional enhancement opposite to a peripheral cue: Commentary on Tse, Sheinberg, and Logothetis
T3  - Zweitveröffentlichungen der Universität Potsdam : Humanwissenschaftliche Reihe - paper 248 
Y1  - 2004
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-57081
ER  - 
TY  - JOUR
A1  - Rolfs, Martin
A1  - Engbert, Ralf
A1  - Kliegl, Reinhold
T1  - Microsaccade orientation supports attentional enhancement opposite to a peripheral cue
Y1  - 2004
ER  - 
TY  - JOUR
A1  - Kliegl, Reinhold
A1  - Grabner, Ellen
A1  - Rolfs, Martin
A1  - Engbert, Ralf
T1  - Length, frequency, and predictability effects of words on eye movements in reading
Y1  - 2004
ER  - 
TY  - JOUR
A1  - Engbert, Ralf
A1  - Kliegl, Reinhold
A1  - Longtin, Andre
T1  - Complexity of eye movements in reading
N2  - During reading, our eyes perform complicated sequences of fixations on words. Stochastic models of eye movement control suggest that this seemingly erratic behaviour can be attributed to noise in the oculomotor system and random fluctuations in lexical processing. Here, we present a qualitative analysis of a recently published dynamical model [Engbert et al., 2002] and propose that deterministic nonlinear control accounts for much of the observed complexity of eye movement patterns during reading. Based on a symbolic coding technique we analyze robust statistical features of simulated fixation sequences
Y1  - 2004
ER  -