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The Interval Tool is designed for recording interval data during behavioral therapy.

Modes. The software has 4 modes corresponding to the 3 types of interval recording and a fourth timer-only mode. The background will turn dark to prompt you to enter data depending on which mode you select.

Momentary time sampling: in this mode data should only be taken on whether the behavior is occurring at the very end of the interval. When the intervals end, an optional notification will sound, and the screen will turn dark until data for that interval is entered.
Whole interval recording: in this mode data should be taken on whether the behavior occurs throughout the whole interval. If the behavior stops and a miss (✗) is recorded the screen will turn blue to indicate that data has been recorded for the interval. If no misses are recorded by the end of the whole interval, the screen will turn dark until data is entered.
Partial interval recording: in this mode data should be taken on whether the behavior occurs at any point during the interval. If the behavior occurs and a positive (✓) is recorded the screen will turn blue to indicate that data has been recorded for the interval. If the behavior hasn't been noted when the interval ends, the screen will turn dark to prompt you to enter data.
Timer: during the final second of each interval an optional notification will sound, and the screen will briefly turn orange.

Clickers. Both the correct (✓) and incorrect (✗) clicker buttons will record data every time they are pressed. To maintain flexibility, they can be pressed at any time and will log the data even if the timer is not running. The clicker data will automatically be added to the interval log and saved every time either button is pressed.

Data. All data entered into the tool is automatically logged into a single document. The data can be displayed by clicking on the 'Display counter data' button or copied to the clipboard by clicking the copy (⧉) button. Data will persist even after the app is closed.

To clear data before a new session, tap 'Clear data' and then choose 'erase log' in the menu. To begin a new section in the log: reset the timer, set a new interval length, or set a new recording mode. Interval lengths, recording modes, and dates are added automatically. All data is stored in the web browser; nothing is stored in a remote server.

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