Segmented Data Workflows (Export → Edit → Re-upload)

The Segmented Duration CSV format round-trips: export your data, edit it in a spreadsheet or text editor, and re-upload it. This lets you crop unwanted segments or split one recording into several stimuli.

Rules

Any file you re-upload must use the Segmented Duration CSV columns: stimulus, participant, timestamp, duration, eyemovementtype, AOI (the AOI cell may be empty).

• Keep rows in chronological order within each Participant × Stimulus block.
• Don’t recompute timestamps — GazePlotter renormalizes them on import. The first remaining segment of each Participant × Stimulus is reset to time 0.
• participant and stimulus must always have a value.

Workflow 1: Crop the start of a recording

Mobile recordings often begin with calibration or instructions. Remove them:

1. Export segmented data as CSV.
2. Open it in a spreadsheet or text editor.
3. For the Participant × Stimulus you want to trim, delete the early rows.
4. Save as CSV and re-upload.

On import, the first remaining segment becomes the new 0 baseline.

Workflow 2: Split one recording into several stimuli

To break a long recording into separate phases:

1. Export segmented data as CSV.
2. Find the timestamps where phases change.
3. Rename the stimulus value per phase (e.g. Shopping_Task → Shopping_Selection, Shopping_Checkout, Shopping_Review).
4. Save as CSV and re-upload.

Each distinct stimulus name becomes an independent stimulus with its own 0 baseline.