Spoken language outcome measures for treatment studies in Down syndrome: feasibility, practice effects, test-retest reliability, and construct validity of variables generated from expressive language sampling

Table 2 Feasibility of ELS procedures: compliance, number of C-units per sample, and completeness

ELS procedure	Test	Retest
Conversation^a
Non-compliant examiner/transcriber report	4/107 (3.7%)	7/105 (6.67%)
Total sample utterance length	4/107 (3.7%)	1/105 (0.95%)
Analysis set utterance length	19/107 (17.76%)	5/105 (1.90%)
Sample duration^a	1/107 (0.9%)	1/105 (0.95%)
Narration^b
Non-compliant examiner/transcriber report	15/106 (14.15%)	15/105 (14.29%)
Total sample utterance length	10/106 (9.43%)	7/105 (6.67%)
Analysis set utterance length	22/106 (20.76%)	16/105 (15.24%)
Sample duration^c	12 NC/7 partial (17.92%)	13 NC/6 partial (18.10%)

Cell values indicate number (and percentages) of participants
^aTwo Time 2 Conversations missing due to youth not returning for visit
^bOne Time 1 Narration missing due to examiner error, two Time 2 Narrations missing due to youth not returning for visit
^cDefined in terms of time for conversation and coverage of pages for narration

ISSN: 1866-1955