saccade_length_out#

pymovements.measure.reading.saccade_length_out(fixations: DataFrame) → DataFrame[source]#

Compute the saccade length at first-pass word exit (SL_out).

SL_out is the signed word distance from the current word to the next fixated word, measured at the last fixation of the first run.

Parameters:

fixations (pl.DataFrame) – Fixation table containing at least trial, page, word_idx, run_id, onset, and next_word_idx columns.

Returns:

DataFrame with columns trial, page, word_idx, and SL_out.

Return type:

pl.DataFrame