Differences

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--- en:results:variables [15.11.2017 09:00] – [External Information] removed, can be obtained in the "client information" question admin
+++ en:results:variables [02.03.2018 08:30] – [Dwell Times] admin
@@ Line 32: / Line 32: @@
-===== Dwell Times =====
+===== Completion Times =====
   * **TIMEnnn** The variables ''TIME001'' etc. store the time (in seconds) that a participant stayed on a questionnaire page. If the participant visits the page multiple times (e.g., using the back button) these times are summed up. Generally, dwell times are rather imprecise, because they contain loading times.
@@ Line 39: / Line 39: @@
     * they exceed the page's dwell time media by more than 3 inter quartile ranges (IQR) divided by 1.34 (equals more than 3 standard deviations in a normally distributed sample)
   * **TIME_RSI** An index that indicates how much faster a participant has completed the questionnaire than the typical participant (median) has done. Values above 1 identify faster respondents, values below 1 slower respondents. Details see below.
+**Note:** The parameters ''TIME_SUM'' and ''TIME_RSI'' only contain a value if the downloaded data set contains at least 10 records for the respective questionnaire ([[:en:results:troubleshooting#selection_criteria_filter]]). The more records the download contains, the more accurate the values for ''TIME_SUM'' and ''TIME_RSI'' will be, because the distribution of response times in the sample is used to clean outliers or to normalize them.
 **Note:** The response times are only included in the data set if the option to download the dwell times has been checked the //variables// selection of the download options. This option is checked by default.