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en:results:variables [29.03.2017 07:31] – [Dwell Times] cofrin | en:results:variables [15.11.2017 09:00] – [External Information] removed, can be obtained in the "client information" question admin | ||
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===== Dwell Times ===== | ===== Dwell Times ===== | ||
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- | **Note:** The handling times for each page are available if the option //Download the time spent per page// has been selected in variable selection. | ||
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- | **Note:** If using '' | ||
* **TIMEnnn** The variables '' | * **TIMEnnn** The variables '' | ||
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* they are longer than 2 hours or | * they are longer than 2 hours or | ||
* 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) | * 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, | ||
+ | |||
+ | **Note:** The response times are only included in the data set if the option to download the dwell times has been checked the // | ||
+ | |||
+ | **Note:** Processing times are recorded automatically. To deactivate the recording, please uncheck the option in **Survey Project** → **Project Settings** → tab //Privacy// → //record time and duration during the survey//. | ||
+ | |||
===== Quality Indicators ===== | ===== Quality Indicators ===== | ||
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* When using [[: | * When using [[: | ||
* **MISSREL** Percentage of missing answers weighted by the other participants answering behavior. Questions that are rarely answered (e.g., voluntary text questions) are mostly irrelevant for this value, questions that most participants have answered weight worse. The linear weighting factor for a question/ | * **MISSREL** Percentage of missing answers weighted by the other participants answering behavior. Questions that are rarely answered (e.g., voluntary text questions) are mostly irrelevant for this value, questions that most participants have answered weight worse. The linear weighting factor for a question/ | ||
- | * **DEG_TIME** Negative points for extremely fast completion. This value is normed in such way that values of more than 100 points indicate low-quality data. Data quality, however, is no dichotomous attribute. If you prefer a more strict filtering, a threshold of 75 or even 50 points may as well be useful as a threshold of 200 for more liberal filtering. | + | * **DEG_TIME** Negative points for extremely fast completion. This value is normed in such way that values of more than 100 points indicate low-quality data. Data quality, however, is no dichotomous attribute. If you prefer a more strict filtering, a threshold of 75 or even 50 points may as well be useful as a threshold of 200 for more liberal filtering. |
- | + | * **TIME_RSI** This parameter | |
- | //LASTPAGE// and // | + | |
- | + | ||
- | A detailed documentation on the indicators calculation | + | |
- | [[http://forum.onlineforschung.org/viewtopic.php? | + | |
- | Note, that the quality indicators DEG_TIME | + | Whether a questionnaire has been completed in its entirety can be determined using the variables // |
- | ===== External Information ===== | + | |
- | The following variables will only be included in the data set if the appropriate option was enabled. Further, these data is recorded only if set so in the **Project Settings** => //Privacy// options. | ||
- | {{: | ||
- | * **S_IP** IP address of the participant [REMOTE_ADDR]. This may allow inferences on the location, but is completely useless to identify people who did the questionnaire twice. | ||
- | * **S_LANG** The language (e.g., " | ||
- | * **S_REFERR** Referer -– where did the participant came from [HTTP_REFERER]? | ||
- | * **S_BROWSR** The ID sent by the browser [HTTP_USER_AGENT]. Note that the participant could easily manipulate the browser ID. |