Vinsamlegast notið þetta auðkenni þegar þið vitnið til verksins eða tengið í það: http://hdl.handle.net/1946/18438
The present paper examines the relationship between the strategies used for the resolution of multiple target visual foraging and target complexity. Research into animal and human foraging behaviour of multiple targets suggests that increasing target complexity increases the attentional load of each target and results in the consecutive selection of homogenous targets, defined as ‘runs’ of target types. This is contrary to the heterogenous selection of available targets that is observed in simple target foraging. The current experiment contrasted feature and conjunction finger and eye-movement foraging of 16 participants. The finger foraging was conducted on an iPad and the eye-movement foraging was conducted with an eye-tracker. The results demonstrated the predicted change from heterogenous target selection to a more homogenous selection of targets in the form of longer and less numerous ‘runs’ of particular target types. The change in foraging strategy was observed in both the finger and eye-movement conditions with longer completion times and over-all movement across the screen associated with the conjunction searches when compared to feature searches. This indicates a stable mechanism underlying the strategies used for foraging of different target complexities akin to problem solving. Individual differences in these mechanisms in particular, or in cognitive capacities in general, mediate the foraging strategies used by participants and lead to certain individuals applying the same heterogenous target selection when confronted with stimuli of increasing complexity with no apparent cost; displaying ‘super-foraging’ abilities.
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