| ld5 {quid} | R Documentation |
The dataset from Rouder et al. (2005) on the lexical task.
Description
This is the cleaned dataset from Rouder et al. (2005) on the lexical task. Participants were presented with number stimuli ranging from 2 to 4 and from 6 to 8 and had to indicate whether the stimuli number is bigger or smaller than 5. The data cleaning that was performed was: removing two participants who gave up, excluding trials with too fast and too slow responses, excluding trials with wrong responses, excluding the first 20 trials of the first block, excluding the first trial in every block.
Usage
ld5
Format
A data.frame of 17031 rows and 9 columns
- sub
Factor with 52 levels giving the subject ID: 0-29, 35-42, 44-56, 58
- block
Numeric values giving the block: 1-5
- trial
Numeric values giving the number of the trial within a block
- stim
Numeric values giving the type of stimulus: 0 = 2, 1 = 3, 2 = 4, 3 = 6, 4 = 7, 5 = 8
- resp
Numeric values giving the participant's response: 1 = bigger, 2 = smaller
- rt
Numeric values giving the response times in milliseconds
- error
Numeric values indicating whether participant gave a wrong answer (all 0)
- side
Factor with 2 levels indicating whether stimulus is below (1) or above (2) 5
- distance
Factor with 3 levels indicating how far the stimulus number is away from 5
Source
Rouder, J. N., Lu, J., Speckman, P., Sun, D., & Jiang, Y. (2005). A hierarchical model for estimating response time distributions. Psychonomic Bulletin & Review, 12(2), 195-223., retrieved from https://raw.githubusercontent.com/PerceptionCognitionLab/data0/master/lexDec-dist5/ld5.all