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Research Article

Attentional guidance from unique faster/slower discrete and smooth feature changes in visual search

Received 29 Jun 2023, Accepted 22 Mar 2024, Published online: 19 Apr 2024

Figures & data

Figure 1. Static screenshot example of the search display in the discrete case. In the example, set size = 9; target bar = horizontal.

Figure shows 9 shapes consisting of red or blue diamond or square shapes. These shapes are arranged around a central fixation point in a notional circle. Inside each of the shapes is a hollow circle in which there is a bar. Eight of the bars are tilted left or right but one of the bars is horizontal.
Figure 1. Static screenshot example of the search display in the discrete case. In the example, set size = 9; target bar = horizontal.

Figure 2. Median correct response times for the individual target–distractor combinations for discrete trials (left and right column, respectively) for Experiments 1 and 2 (top and bottom rows, respectively). Set size is on the abscissa; the ordinate depicts the cross-participant median correct response time (ms). Target rate is indicated by marker shape: triangle = 1.79 Hz; circle = 3.57 Hz, square = 7.14 Hz. The line colour denotes the distractor: black line = 1.79 Hz; dark-grey line = 3.57 Hz; light-grey  = 7.14 Hz. Separate lines are given for each target–distractor combination (A–G). Condition is denoted by the dash type of the line and the marker fill: solid line + solid fill denotes baseline (T = D), long-dashed line + marker with horizontal black–white stripes = the slower target (T < D), short-dotted line + marker with vertical black–white stripes = faster target condition (T > D). Error bars show ±1 standard error.

Four line graphs are shown in a square formation. The upper two line graphs are labelled "Exp. 1." The lower two line graphs are labelled "Exp. 2." The left two line graphs are labelled "Discrete". The right two line graphs are labelled "Smooth". The x-axis denotes Set size (3, 6, 9) the y-axis denotes Median correct response time (ms) and values on the axis are from 800 to 2600. The figure legends denote the conditions A to G for each individual line.
Figure 2. Median correct response times for the individual target–distractor combinations for discrete trials (left and right column, respectively) for Experiments 1 and 2 (top and bottom rows, respectively). Set size is on the abscissa; the ordinate depicts the cross-participant median correct response time (ms). Target rate is indicated by marker shape: triangle = 1.79 Hz; circle = 3.57 Hz, square = 7.14 Hz. The line colour denotes the distractor: black line = 1.79 Hz; dark-grey line = 3.57 Hz; light-grey  = 7.14 Hz. Separate lines are given for each target–distractor combination (A–G). Condition is denoted by the dash type of the line and the marker fill: solid line + solid fill denotes baseline (T = D), long-dashed line + marker with horizontal black–white stripes = the slower target (T < D), short-dotted line + marker with vertical black–white stripes = faster target condition (T > D). Error bars show ±1 standard error.

Figure 3. The top row depicts search slopes (ms/item) for the seven target–distractor combinations (A–G) for the discrete and smooth trials. The bottom row depicts mean search slopes calculated across the corresponding trial types for the three conditions (baseline, T = D; faster target, T > D; slower target, T < D). Error bars show ±1 standard error.

Figure 3. The top row depicts search slopes (ms/item) for the seven target–distractor combinations (A–G) for the discrete and smooth trials. The bottom row depicts mean search slopes calculated across the corresponding trial types for the three conditions (baseline, T = D; faster target, T > D; slower target, T < D). Error bars show ±1 standard error.