The Adaptation of the Communicative Effectiveness Index (CETI) into Greek: A Reliability and Validity Study

Area of Science:

• Neuroscience
• Speech and Language Therapy
• Psychometrics

Background:

• Aphasia significantly impacts daily communication, necessitating reliable assessment tools.
• The Communicative Effectiveness Index (CETI) is a carer-reported scale for measuring functional communication changes.
• A Greek version of the CETI is needed to support rehabilitation efforts in Greece.

Purpose of the Study:

• To translate and culturally adapt the CETI into Greek, creating the CETI-GR.
• To validate the psychometric properties of the CETI-GR for use with Greek-speaking individuals with aphasia.
• To assess the reliability and validity of the CETI-GR for evaluating functional communication.

Main Methods:

• The CETI was translated into Greek using a rigorous back-translation process.
• Pilot testing and content validity studies ensured the tool's acceptability.
• Psychometric evaluation included internal consistency, test-retest reliability, inter-rater reliability, and convergent validity assessments in 30 people with aphasia and 30 carers.

Main Results:

• The CETI-GR demonstrated excellent internal consistency (Cronbach's α > 0.95) and inter-rater reliability (ICC ≥ 0.93).
• High test-retest reliability (ICC = 0.88) was observed.
• Convergent validity was supported by significant correlations with measures of language severity, functional communication, and quality of life.

Conclusions:

• The CETI-GR is a psychometrically sound and reliable instrument for assessing functional communication in individuals with chronic aphasia.
• The Greek adaptation of the CETI facilitates person-centered aphasia rehabilitation.
• The CETI-GR can improve the quality of life for people with aphasia and their carers in Greece.