Study: NCT05894967

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: C7 - Parafoveal Training (PT)
Description: The PT condition is the baseline for C8-C11 (all of which involve parafoveally presented targets). In PT, we utilize the same task as in SPL, however, in PT, in addition to central training, targets will also appear in one of two peripheral locations (5° eccentricity; angles = 135° and 270°). The location of targets will be randomized trial-wise so as to discourage eye-movements and independent 3/1 staircases will be run at each location. By training only 2 peripheral locations we can measure the extent to which training gives rise to location transfer (e.g., in transfer tasks examining performance at 8 different locations - 2 trained locations and 6 untrained locations). Furthermore, training at the central location facilitates comparisons between PT and SPL.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: C7 - Parafoveal Training (PT)
Description: The PT condition is the baseline for C8-C11 (all of which involve parafoveally presented targets). In PT, we utilize the same task as in SPL, however, in PT, in addition to central training, targets will also appear in one of two peripheral locations (5° eccentricity; angles = 135° and 270°). The location of targets will be randomized trial-wise so as to discourage eye-movements and independent 3/1 staircases will be run at each location. By training only 2 peripheral locations we can measure the extent to which training gives rise to location transfer (e.g., in transfer tasks examining performance at 8 different locations - 2 trained locations and 6 untrained locations). Furthermore, training at the central location facilitates comparisons between PT and SPL.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: C7 - Parafoveal Training (PT)
Description: The PT condition is the baseline for C8-C11 (all of which involve parafoveally presented targets). In PT, we utilize the same task as in SPL, however, in PT, in addition to central training, targets will also appear in one of two peripheral locations (5° eccentricity; angles = 135° and 270°). The location of targets will be randomized trial-wise so as to discourage eye-movements and independent 3/1 staircases will be run at each location. By training only 2 peripheral locations we can measure the extent to which training gives rise to location transfer (e.g., in transfer tasks examining performance at 8 different locations - 2 trained locations and 6 untrained locations). Furthermore, training at the central location facilitates comparisons between PT and SPL.

Intervention type: BEHAVIORAL
Group type: OTHER
Intervention: C7 - Parafoveal Training (PT)
Description: The PT condition is the baseline for C8-C11 (all of which involve parafoveally presented targets). In PT, we utilize the same task as in SPL, however, in PT, in addition to central training, targets will also appear in one of two peripheral locations (5° eccentricity; angles = 135° and 270°). The location of targets will be randomized trial-wise so as to discourage eye-movements and independent 3/1 staircases will be run at each location. By training only 2 peripheral locations we can measure the extent to which training gives rise to location transfer (e.g., in transfer tasks examining performance at 8 different locations - 2 trained locations and 6 untrained locations). Furthermore, training at the central location facilitates comparisons between PT and SPL.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: C8 - Stimulus Variety (SV)
Description: The base task for SV is the PT condition. However, SV employ 20 trial mini-blocks of different SFs (.75, 1.5, 3, 6, 12, 24 cpd) and locations (45°, 135°, 225°, 315° - i.e., more locations than PT, but not the full set tested in the transfer battery) with separate staircases for each SF and location. Orientations will also be drawn from a larger set (22.5°, 45°, 67.5° - for which participants respond clockwise and 112.5°, 135°, 157.5° - for which participants respond counter-clockwise) and will vary on a trial-by-trial basis. This design holds-out 4 locations and 2 orientations to address transfer.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: C8 - Stimulus Variety (SV)
Description: The base task for SV is the PT condition. However, SV employ 20 trial mini-blocks of different SFs (.75, 1.5, 3, 6, 12, 24 cpd) and locations (45°, 135°, 225°, 315° - i.e., more locations than PT, but not the full set tested in the transfer battery) with separate staircases for each SF and location. Orientations will also be drawn from a larger set (22.5°, 45°, 67.5° - for which participants respond clockwise and 112.5°, 135°, 157.5° - for which participants respond counter-clockwise) and will vary on a trial-by-trial basis. This design holds-out 4 locations and 2 orientations to address transfer.