Visual Discrimination Training Increases the Rate and Anticipates Stimuli Processing

Behavioral responses during discrimination learning of Kanji stimuli
We evaluated whether increasing levels of perceptual expert-like performance throughout discrimination training, shapes the onset and rate of stimuli processing, by assessing the sensitivity with brief stimulus duration across four levels of discrimination training. Participants developed perceptual expertise throughout six Kanji discrimination training sessions (2, 3, 5, 6, 8, 9), with a same-different task. The impact of discrimination training on performance in the few milliseconds after stimulus onset was evaluated in four interspersed evaluation sessions (1, 4, 7, 10). We anticipated that greater expert-like performance would result in a faster rate of and an earlier stimulus processing.
We provide behavioral evidence for the modulation of stimulus processing during the first milliseconds after stimulus onset while participants developed perceptual expertise. There was a gradual increase in sensitivity with increasing training and longer exposure duration. The effect of training on performance varied with exposure duration. Modeling of the sensitivity data with increasing amounts of training and exposure duration suggest a faster rate and an earlier onset of stimulus processing.
This data suggest that perceptual expertise speeds up the stimulus processing and anticipates the availability of information for coding.

sessions (eval) 01, 04, 07, 10 are perceptual evaluation sessions with different stimulus durations

item trial
stim1dur stimulus duration (s)
cond same or different pair
E1 E2 Stimulus 1, 2 id
sideE2 Stimulus 2 rotation
M1 mask id
resp Participant response
rt Response time

Sessions ( tra) 02, 03, 05, 06, 08, 09 are discrimination training sessions with 100 ms stimulus duration

item trial
cond same or different pair
E1 E2 E3 Stimulus 1 and 2 ids stimulus 2 is a perceptual mask
sideE3 Stimulus 3 rotation
M1 M2 M3 masks 1, 2, 3 ids
resp Participant response
rt Response time

rh right hand button for same response
lh left hand button for same response

汉字刺激辨别学习过程中的行为反应

本研究通过在四档辨别训练阶段下以短刺激时长评估感知敏感性，旨在探究辨别训练过程中逐步提升的类专家知觉表现是否会塑造刺激加工的起始时点与加工速率。参与者通过六次汉字辨别训练环节（第2、3、5、6、8、9次）完成同异判断任务（same-different task），在此过程中逐步习得知觉专家技能。本研究穿插设置了四次评估环节（第1、4、7、10次），以评估辨别训练对刺激呈现后数毫秒内行为表现的影响。我们预设：更高水平的类专家知觉表现，将对应更快的刺激加工速率与更早的刺激加工起始时点。

本研究提供了行为证据，表明在参与者习得知觉专家技能的过程中，刺激呈现后的最初数毫秒内的刺激加工会受到调控。随着训练次数增加与刺激呈现时长延长，感知敏感性逐步提升；且训练对表现的影响会随刺激呈现时长变化而改变。对随训练次数与刺激呈现时长递增的敏感性数据进行建模分析后发现，刺激加工速率得以提升且起始时点提前。

本数据集相关结果表明，知觉专家技能可加快刺激加工进程，并提前实现编码所需信息的可用性。

sessions（eval）第01、04、07、10次为不同刺激时长的知觉评估任务，字段说明如下：
trial 试次编号
stim1dur 刺激呈现时长（单位：秒）
cond 刺激对类型（相同或相异）
E1、E2 刺激1与刺激2的标识符
sideE2 刺激2的旋转角度
M1 掩蔽刺激标识符
resp 被试反应
rt 反应时

Sessions（tra）第02、03、05、06、08、09次为刺激呈现时长100毫秒的辨别训练任务，字段说明如下：
trial 试次编号
cond 刺激对类型（相同或相异）
E1、E2、E3 刺激1、刺激2与刺激3的标识符，其中刺激2为知觉掩蔽刺激
sideE3 刺激3的旋转角度
M1、M2、M3 掩蔽刺激1、2、3的标识符
resp 被试反应
rt 反应时

rh：右手按键对应“相同”反应
lh：左手按键对应“相同”反应