Saccadic momentum and facilitation of return saccades contribute to an optimal foraging strategy
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Saccadic momentum and facilitation of return saccades contribute to an optimal foraging strategy. / Wilming, Niklas; Harst, Simon; Schmidt, Nico; König, Peter.
In: PLOS COMPUT BIOL, Vol. 9, No. 1, 2013, p. e1002871.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - Saccadic momentum and facilitation of return saccades contribute to an optimal foraging strategy
AU - Wilming, Niklas
AU - Harst, Simon
AU - Schmidt, Nico
AU - König, Peter
PY - 2013
Y1 - 2013
N2 - The interest in saccadic IOR is funneled by the hypothesis that it serves a clear functional purpose in the selection of fixation points: the facilitation of foraging. In this study, we arrive at a different interpretation of saccadic IOR. First, we find that return saccades are performed much more often than expected from the statistical properties of saccades and saccade pairs. Second, we find that fixation durations before a saccade are modulated by the relative angle of the saccade, but return saccades show no sign of an additional temporal inhibition. Thus, we do not find temporal saccadic inhibition of return. Interestingly, we find that return locations are more salient, according to empirically measured saliency (locations that are fixated by many observers) as well as stimulus dependent saliency (defined by image features), than regular fixation locations. These results and the finding that return saccades increase the match of individual trajectories with a grand total priority map evidences the return saccades being part of a fixation selection strategy that trades off exploration and exploitation.
AB - The interest in saccadic IOR is funneled by the hypothesis that it serves a clear functional purpose in the selection of fixation points: the facilitation of foraging. In this study, we arrive at a different interpretation of saccadic IOR. First, we find that return saccades are performed much more often than expected from the statistical properties of saccades and saccade pairs. Second, we find that fixation durations before a saccade are modulated by the relative angle of the saccade, but return saccades show no sign of an additional temporal inhibition. Thus, we do not find temporal saccadic inhibition of return. Interestingly, we find that return locations are more salient, according to empirically measured saliency (locations that are fixated by many observers) as well as stimulus dependent saliency (defined by image features), than regular fixation locations. These results and the finding that return saccades increase the match of individual trajectories with a grand total priority map evidences the return saccades being part of a fixation selection strategy that trades off exploration and exploitation.
KW - Food Supply
KW - Humans
KW - Models, Theoretical
KW - Saccades
U2 - 10.1371/journal.pcbi.1002871
DO - 10.1371/journal.pcbi.1002871
M3 - SCORING: Journal article
C2 - 23341766
VL - 9
SP - e1002871
JO - PLOS COMPUT BIOL
JF - PLOS COMPUT BIOL
SN - 1553-734X
IS - 1
ER -
