**Understand the metrics you are receiving from Sticky for your areas of interest when you download your AOI statistics as a .csv file.**

*avg_time_fixating*

- Calculation - The sum of the (end - start) sub-periods of times for each participant where the fixation overlaps the AOI in X and Y and time for a least a sub-period of the fixation for all participants with the result divided by the number of total participants who had at least 1 fixation within the AOI. If a participant did not see the AOI, they are not included in the statistics.
- Units - seconds.

Simple: The average amount of time that a respondent spends on an AOI. If the respondent did not see the AOI, they are not included in the statistics.*avg_time_to_first_fixation*

- Calculation - For all participants who have at least 1 fixation which overlaps in time and space for at least a sub-period of this AOI, calculate the elapsed time from the onset of the stimulus to the start time of the first fixation where it overlaps with the AOI. Participants who do not see the AOI are removed from the calculation. If an AOI starts after the beginning of the stimulus, fixations which are located inside the AOI before it starts or after it ends are not counted.
- Units - seconds. If there are no fixations, it is -1.

Simple: The average amount of time it takes for a respondent to see an AOI. Respondents that who does not see the the AOI will not be included in the statistics.

*avg_first_fixation_rank*

- Calculation - The rank of avg_time_to_first_fixation across all AOIs starting at 1 and sorted from the shortest to the longest avg_time_to_first_fixation. If multiple AOIs have the same value, they are all given the lowest rank and then the next AOI starts at the rate which is the total number of AOIS before it. If an AOI received no fixations, its value is the total number of AOIs that exist.

Simple: The number of AOIs which were looked at before this one on average.

*avg_time_to_first_click*

- Calculation - The amount of time between the onset of the stimulus and the first click which is registered / number of participants who clicked at least once. If there are no clicks, it is -1.
- Units - seconds.

Simple: The average amount of time it takes for a respondent to click inside the AOI. If there are no clicks it will say -1.*avg_time_to_first_fixation_since_last_navigation*

- Calculation - For all participants who have at least 1 fixation which overlaps in time and space for at least a sub-period of this AOI, calculate the elapsed time from the onset of the stimulus or the latest navigation event (whichever is smaller) to the start time of the first fixation within this AOI. Participants who do not see the AOI are removed from the calculation. If there are no fixations, it is -1.
- Units - seconds.

Simple: We only show this for web page stimulus. It is basically the same as avg_time_fixating but with a small change. When a web page stimulus is loading the experiment recorder will first load a blank page and then load the actual stimulus. This statistics will reset. Also, if there is an option to click on a link in the stimulus to see another page

*avg_fixation_duration*

- The average length (end - start) of all fixations which overlap at least partially with this AOI. If an AOI partially overlaps in time, only the overlapping time is counted. If there are no fixations, it is -1.
- Units - seconds.

Simple: The average amount of time a respondent spends on an AOI per time they look at it. This means that if a respondent looks at the AOI for three seconds, then look away for a short while and then back at the AOI for another 1 second. The average would be 2 seconds. ((1+3)/2)=2.

* media_avg_exposure_time*

- Calculation - the average length of the stimulus event for all participants who saw it.
- Units - seconds.

Simple: The average number of seconds the stimulus where shown on the respondents screen.*media_max_exposure_time*

- Calculation - the maximum length of the stimulus event for all participants who saw it.
- Units - seconds.

Simple: The maximum amount of seconds a stimulus were shown on the respondents screen*media_sample_size*

- Calculation - the number of participants in the sample
- Units - participants.

Simple: The number of participants that saw the stimulus

*num_fixations*

- Calculation - For all fixations, if the fixation overlaps the AOI in x and y and in time for at least a sub-period of the fixation, increment the number of fixations for this AOI.
- Units - number of fixations.

Simple: The amount of total fixations inside the AOI

*num_fixating*

- Calculation - The number of participants with at least 1 fixation which overlaps in time and space at least partially with this AOI.
- Units - number of participants.

Simple: Number of participants who have had at least 1 fixation on the AOI.*num_total_revisiting*

- Calculation - num participants who have at least 2 visits to this AOI.
- Units - participants.

Simple: Number of participants who have look at the AOI, look away and then back again.

*num_fixating_revisiting*

- Calculation - num participants who have at least 2 visits to this AOI.
- Units - participants.

*num_first_fixating*

- Calculation - The number of participants who's first time they intersect with any AOI they intersect with this one. Note that they can have multiple that they note 'first' if the AOIs overlap in time and space.
- Units - number of participants.

Simple: Number of participants that saw this AOI first in the stimuli. Note that if there are many AOIs overlapping each other these numbers will turn multiple.

*num_visits*

- Calculation - The total number of times where a participant had a fixation which was in this AOI and then had at least 1 fixation which was not within the AOI. If they had 2 fixations within the AOI then 3 out then 1 back in, they would have 2 visits to this AOI.
- Units - number of visits.

Simple: Total number of times respondents visited an AOI.

*num_fixating_revisiting*

- Calculation - The total number of participants who have gaze points within this AOI and then leave for at least 1 gaze point and then return to the same AOI.

Simple: Total number of respondents that revisited an AOI. (Looked at it, looked away, then back again)

*percent_fixating*

- Calculation - num_noting / total participants who saw this stimulus.
- Units - percent.

Simple: Percentage of how many of the respondents that saw the stimulus actually saw the AOI.

*percent_first_fixating*

- Calculation - num_first_noting / total participants who saw this stimulus.
- Units - percent.

Simple: Percentage of how many of the respondents that saw the stimulus saw this AOI first.

*percent_total_revisiting*

- Calculation - num_revisiting / total participants who saw this stimulus.
- Units - percent.

Simple: Percentage of how many of the respondents that saw the stimulus revisited this AOI. (Looked at it, looked away, then back again)

*Percent_fixated_revisiting*

- Calculation - num_revisiting / total participants who saw this AOI.
- Units - percent.

Simple: Percentage of how many of the respondents that saw this AOI revisited it. (Looked at it, looked away, then back again)

*avg_num_aois_visited_before_this_one*

- Calculation - The number of AOIs each participant sees before this one / total participants who saw this AOI.
- Units - count.

Simple: The average amount of other AOIs the participants who have seen this AOI looked at before they saw this one.

*avg_visits*

- Calculation - num visits / total participants who saw this stimulus.
- Units - visits.

Simple: Average number of participants who saw this stimulus visited this page. (Only for web pages)

*avg_time_to_first_click_since_navigation*

- calculation - For all participants who have at least 1 click which overlaps in time and space, calculate the elapsed time from the onset of the stimulus or the latest navigation event (Whichever is smaller) to the start time of the first click within this AOI. Participants who do not click in the AOI are removed from the calculation. If there are no clicks, it is -1.
- Units - seconds.

Simple: For web pages only.

*num_clicks*

- Calculation - The number of clicks which happen within the AOI.
- Units - clicks.

*num_clicking*

- Calculation - The number of participants with at least 1 click which happens within the AOI.
- Units - clicks.

*percent_clicking*

- Calculation - Number of participants who clicked in the AOI / total participants who saw this stimulus.
- Units - percent.

*percent_of_total_clicks*

- Calculation - num_clicks / total clicks on stimulus across all participants.
- Units - percent.

*total_fixation_duration*

- Calculation - Sum the (end - start) times for all fixations which overlap this AOI in x and y and time for at least a sub-period of the fixation and the time the AOI was present. If there are 2 AOIs with the same name which are viewed at the same time, the union of their viewing times is added. They are not double counted for time. If there are no fixations, it is 0.
- Units - seconds.

Simple: Length of time participant looked at the AOI in seconds.

Notes:

- Participants with bad data, or who did not see this stimulus are removed from the sample before statistics are calculated and are not included in the final data.

Overlap between a fixation and an AOI is always considered to be that:

- The quality for the fixation is 'good'.
- The x and y location of the fixation fall within the bounds of the AOI.
- If end time for the fixation happened before the start time of the fixation, it is not an overlap.
- If start time for the fixation happened after the end time of the fixation, it is not an overlap.