By Jin - 4/29/2016
Hi all,
I am trying to program our Dot Probe task (in Inquisit 4) to output summary data as well as the raw data, but whenever I tried to input the summary data syntax, I get a "not a valid setting" error (i.e. 'date' is not a valid setting). I'm not sure what exactly is incorrect; I've compared our program to other Dot Probes and it seems like the summary data portion is more or less the same.
Additionally I am trying to write an expression that would output the mean latency for each of the trials, but I'm not sure how to write the expression? I have uploaded the file to this post.
Thank you
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By Dave - 4/29/2016
As detailed in the documentation, the <summarydata>'s /columns attribute only accepts *properties* (as well as values and expressions). I.e.
<summarydata>
/ file = "FaceDotProb_summary.iqdat"
/ columns = [date, subject, blockcode, latency, error, percentcorrect, ...]
...
</summarydata>
needs to read
<summarydata>
/ file = "FaceDotProb_summary.iqdat"
/ columns = [script.startdate, script.subjectid, ...]
...
</summarydata>
Things like 'error', 'latency' or 'blockcode' make no sense in a summary data file. A summary data file is supposed to capture *a single line of summary statistics*, and 'error' or 'latency' are neither. Those things belong in the trial-by-trial raw data file.
You don't need to write an expression to capture the mean latency for each <trial> element to the summary file. You can directly log the respective property:
<summarydata>
...
/ columns = [..., trial.abbl.meanlatency, trial.abbl.totalmeanlatency, trial.abbr.meanlatency, trial.abbr.totalmeanlatency, ...]
...
</summarydata>
meanlatency and totalmeanlatency should be identical in your case, but note the difference as detailed in the documentation:
meanlatency property:
The mean response latency for the specified element within the current block.
totalmeanlatency property:
The mean response latency for the specified element over the entire experiment.
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