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Category: Data

Description: . Instructions: ------------ 1. Download the data file "probe_data.Rda" or the data file "probe_data_follow_up.Rda". 2. Copy the local path of the data file to 'my_path' variable (line 63); e.g. "~/Downolads/" 3. Select the file to be analyzed by uncommenting the appropriate file name to 'my_datafile' variable (lines 65-66) 4. If you do not have the 'lme4' and 'ggplot2' packages, install it (type to Consule 'install.packages("lme4")' or 'install.packages("ggplot2")'). Data file description: --------------------- In the "probe_data.Rda" file you will find the raw data from the probe phase of ten experiments, and five follow-up sample from Experiments 1-2 and 7-9, described in Salomon et al. (2017). The code analyses the proportion of trials participants chose the Go items over No-GO items using a logistic regression with subject's code as a random effect. The analysis indicate significant proportions in comparison to the null hypothesis of 50% chance level (log-odds = 0). It also computes 95% CI, and plot the results in a forest plot. Data frame variables: -------------------- Variables used in the analysis: "Outcome" - Binary variable indicating whether participant chose the Go item (1) or the NoGo item (0). This is the dependent variable in the logistic regression analysis. "subjectID" - Participant's code, is used as a random effect in the logistic regression analysis. "PairType" - Categorical veriable indicating the type of comparison: 1 - High value: Go vs. NoGo 2 - Low value: Go vs. NoGo 3 - Sanity Go: High value Go vs. low value Go 4 - Sanity NoGo: High value NoGo vs. low value NoGo "PairType2" - Same as PairType variable, only as a character class Results are analyzed separately for each pair type, or with PairType as a fixed effect to estimate differences of Go choices in high versus low value pairs. "PairType3" - for experiments 1-4, ech category's 8x8 pairs were separeted to two pair-types, each of the higher and lower 4x4 pairs. "Experiment" - the experiment number as appearing in Salomon et al. (2017). Each experiment is analyzed separately. "ExperimentName" - description of the experiment's stimuli and cues "ExperimentNameFull" - Useful title for each experiment, ordered accordingly to its number Other recorded variables: "scanner" - Was the experiment conducted in an fMRI settings. All experiments were not. "order" - Used to counter-balance Go signal association during training "block" - full presentation of all probe choices. Each experiment comprised of two blocks. "run" - Each block was split into two runs, for compatibility with fMRI experimental settings. "trial" - trial number "onsettime" - Stimuli onset time "ImageLeft" - The name of the stimulus left of the fixation cross "ImageRight"- The name of the stimulus right of the fixation cross "bidLeft" - The initial value of the stimulus left of the fixation cross (as estimate in a BDM or binary ranking task) "bidRight" - The initial value of the stimulus right of the fixation cross (as estimate in a BDM or binary ranking task) "bidIndexLeft" - The rank-order value of the stimulus left of the fixation cross (range: 1-60) "bidIndexRight" - The rank-order value of the stimulus right of the fixation cross (range: 1-60) "IsleftGo" - Binary variable indicating if the left stimulus is Go (1) or No-Go (0). In sanity choices, high value items are indicated similarly to Go items. "Response" - participant's choice: "u" - left item, "i" for right items, "x" if subject did not responde on time (RT>1500 ms). When subject responded by choosing the Go item (i.e. IsleftGo==1 & Response=="u", IsleftGo==0 & Response=="i"), the resulting Outcome will be (1). "RT" - reaction time. Version notes, September 18th 2017: This section has been modified in accordance with the latest version of the manuscript: Experiment 1, which was reported as pilot experiment in previous versions of the manuscript, was included in the main analysis codes; experiments were reordered throughout the manuscript and R codes; codes to recreate the plots were added.