This in turn could reflect the nature of the stimuli involved, in terms of either their spatial vs. nonspatial features, their salience and/or their prominence throughout the length of each goal arm, from the choice point, through the 'holding area' where animals wait on delayed HR trials and finally to the reward.
Grouping is often intended as a general-purpose early vision stage which gathers together image features of perceptual salience, usually having a well-definable structure.
However they might be signaling information about the cues themselves, such as their shared sensory features or intrinsic salience.
This reversible CRF pattern is highly similar to the cue-locked enhancement pattern of amphetamine observed here and in previous experiments, a pattern that originally helped implicate identify incentive salience features mediated by mesolimbic dopamine systems [ 30, 31].
This ensured that the permanent and transient landmarks, as well as being matched for their perceptual features (size, visual salience, and other features see above), were placed in equivalent locations within the environment.
In contrast, when the target was defined by a conjunction of features, and a salience-based search strategy was therefore not suitable, the presence of the singleton distractor had a static effect on RT, and proximity effects were no longer apparent.
Our results suggest that the present task facilitated the use of a feature strategy possibly through increasing the salience of the feature cues or through taxing memory by increasing the number of search locations.
To test the previously stated prediction about salience of features of ensemble and summary displays, we utilized the Itti et al. (1998) salience model.
Directly manipulating the salience of features with animations, in line with Fabrikant et al. (2010) and Hegarty et al. (2010), is a possible future direction for this work.
Immediacy, authority, and salience are features of the epistemology of self-knowledge that the Cartesian view is best-placed to accommodate.
