Study: NCT05894967

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: C5 - Noise Training (NT)
Description: The NT condition will be the same as SPL with the exception that contrast thresholds will be estimated in 5-different levels of external noise (10%, 15%, 20%, 25%, 30%).

Intervention type: BEHAVIORAL
Group type: OTHER
Intervention: C5 - Noise Training (NT)
Description: The NT condition will be the same as SPL with the exception that contrast thresholds will be estimated in 5-different levels of external noise (10%, 15%, 20%, 25%, 30%).

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: C5 - Noise Training (NT)
Description: The NT condition will be the same as SPL with the exception that contrast thresholds will be estimated in 5-different levels of external noise (10%, 15%, 20%, 25%, 30%).

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: C6 - Training with Flankers (TWF)
Description: TWF will be reasonably different from the standard SPL task. Here, on 50% of trials a target Gabor will be presented at either 45° or 135° (as in SPL) and will be flanked by two collinear Gabors. On the remaining 50% of trials, flankers will be present without a target. TWF is thus a yes/no detection task, which is necessary since the collinear flankers fully indicate the target orientation. In different 20-trial mini-blocks the flankers will appear either lambda, 1.5 lambda, or 2 lambda from the target (i.e., closer or further from the target) and target contrast will be controlled by a 3/1 staircase separately for each spacing.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: C6 - Training with Flankers (TWF)
Description: TWF will be reasonably different from the standard SPL task. Here, on 50% of trials a target Gabor will be presented at either 45° or 135° (as in SPL) and will be flanked by two collinear Gabors. On the remaining 50% of trials, flankers will be present without a target. TWF is thus a yes/no detection task, which is necessary since the collinear flankers fully indicate the target orientation. In different 20-trial mini-blocks the flankers will appear either lambda, 1.5 lambda, or 2 lambda from the target (i.e., closer or further from the target) and target contrast will be controlled by a 3/1 staircase separately for each spacing.

Intervention type: BEHAVIORAL
Group type: OTHER
Intervention: C6 - Training with Flankers (TWF)
Description: TWF will be reasonably different from the standard SPL task. Here, on 50% of trials a target Gabor will be presented at either 45° or 135° (as in SPL) and will be flanked by two collinear Gabors. On the remaining 50% of trials, flankers will be present without a target. TWF is thus a yes/no detection task, which is necessary since the collinear flankers fully indicate the target orientation. In different 20-trial mini-blocks the flankers will appear either lambda, 1.5 lambda, or 2 lambda from the target (i.e., closer or further from the target) and target contrast will be controlled by a 3/1 staircase separately for each spacing.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: C6 - Training with Flankers (TWF)
Description: TWF will be reasonably different from the standard SPL task. Here, on 50% of trials a target Gabor will be presented at either 45° or 135° (as in SPL) and will be flanked by two collinear Gabors. On the remaining 50% of trials, flankers will be present without a target. TWF is thus a yes/no detection task, which is necessary since the collinear flankers fully indicate the target orientation. In different 20-trial mini-blocks the flankers will appear either lambda, 1.5 lambda, or 2 lambda from the target (i.e., closer or further from the target) and target contrast will be controlled by a 3/1 staircase separately for each spacing.

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.