Reliability of single sample experimental designs: Comfortable effort level

Citation
Ws. Brown et al., Reliability of single sample experimental designs: Comfortable effort level, J VOICE, 12(4), 1998, pp. 453-459
Citations number
8
Categorie Soggetti
Otolaryngology
Journal title
JOURNAL OF VOICE
ISSN journal
08921997 → ACNP
Volume
12
Issue
4
Year of publication
1998
Pages
453 - 459
Database
ISI
SICI code
0892-1997(199812)12:4<453:ROSSED>2.0.ZU;2-O
Abstract
This study was designed to ascertain the intrasubject variability across mu ltiple recording sessions-most often disregarded in reporting group mean da ta or unavailable because of single sample experimental designs. Intrasubje ct variability was assessed within and across several experimental sessions from measures of speaking fundamental frequency, vocal intensity, and read ing rate. Three age groups of men and women-young, middle-aged, and elderly -repeated the vowel /a/, read a standard passage, and spoke extemporaneousl y during each experimental session. Statistical analyses were performed to assess each speaker's variability from his or her own mean, and that which consistently varied for any one speaking sample type, both within or across days. Results indicated that intrasubject variability was minimal, with ap proximately 4% of the data exhibiting significant variation across experime ntal sessions.