28th International Congress of Psychology August 8 ... - U-netSURF

1063.129 Is the central executive component of working memory a better predictor of general
fluid intelligence? Chang Liu, Xiaojiang Zhang, Yun Tian, Yanan Wang, Nanjing Normal
University, China
Conway et al. (2002) reported that working memory (WM) capacity, but not short-term memory
capacity or processing speed is a good predictor of general fluid intelligence (gF). This study
investigated the relationships among processing speed, WM capacity, the central executive
component of WM, short-term memory capacity and gF. Multiple measures of each of these
constructs were obtained from 265 healthy young adults. Structural equation modeling revealed
that the central executive component of WM is a better predictor of gF than WM capacity.
This research was supported by the Foundation for the Author of National Excellent Doctoral
Dissertation of China (200006).
1063.130 Continuous estimation of the executive functions in random number generation,
Fumihiko Itagaki, Asia University, Japan
The present study demonstrated a continuous analysis method of random number generation
(RNG) task. The method was developed from the Axis model of RNG where randomness was
decomposed into indices of two functional strategies including updating, inhibition, and of
Baddeley’s episodic buffer. Thirty participants were asked to produce a sequence of 500 random
numbers. The results showed that method made it possible to estimate fluctuation of the indices
continuously through the course of the performance except first 100 responses. The method will
be the suitable tools to detect gain and loss of attentional resources in dual task situation.
1063.131 The role of activation in working memory scanning, Robert Balas 1 , Jaroslaw
Orzechowski 2 , Kamila Migasiewicz 2 , 1 Warsaw School of Social Psychology, Poland;
2
Jagiellonian University, Cracow, Poland
The purpose of the study was to determine particular activation mechanisms in working memory
scanning. According to the two-phase model of WM scanning the process involved parallel and
automatic reorganization of information (phase 1) and sequential and controlled search for target
information (phase 2). The time and accuracy of target identification depends on its
discriminability from other stimuli stored in WM. The experiment was conducted in modified
Sternberg's paradigm. The discriminability was manipulated by presenting subthreshold stimuli
before the target. The results support the thesis that stimulus discriminability based on its
activation is plays crucial role in WM scanning.
1063.132 Effect of position in working memory scanning, Krzysztof T. Piotrowski, Zbigniew
Stettner, Jagiellonian University, Poland
According to WM activation models every information stored in WM is activated. Information
that is currently in the focus of attention is the highest activated but its activation decreases in time.
Contemporary models of WM scanning (e.g. two-phases model) suggest that time and accuracy of
target identification depends on its activation. In serial presented set, activation of the element
should depend on the position. Experiment was conducted in Sternberg’s paradigm. Position effect
was measured in different set sizes and for different target positions in the set. The results allow to
suppose that activation degree depends on position in the set.
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