Scale Analysis

The McGill Friendship Questionnaire – Friendship Function (McGill-FF) was developed by Mendelson and Aboud in 1999 to measure the functional characteristics of a friendship that the respondent has with another person.

Purpose

The McGill Friendship Questionnaire – Friendship Function (McGill-FF) assesses feelings toward a friend or a friendship and aims to examine six distinct friendship characteristics in late adolescence and adulthood.

Question Calibration

The McGill-FF consists of 30 items that measure six friendship features:
Companionship
Help provision
Intimacy
Trust
Emotional security
Self-validation
Each statement is rated on a 9-point Likert scale, ranging from 0 (never) to 8 (always).

Statistical Analysis

Participants filling out the questionnaire are asked to circle a number on the 9-point Likert scale indicating how often their friend does what the item describes or how well it reflects the quality of their friendship.
There are no right or wrong answers, as adult friendships vary greatly in form and nature.

Validity and Reliability

The Greek translation of the questionnaire was carried out by Pezirkianidis and Stalikas.
The subscales demonstrated high internal consistency, with Cronbach’s alpha values ranging from 0.84 to 0.90, and for the total score, Cronbach’s alpha = 0.97 (Mendelson & Aboud, 1999), consistent over time.
It is concluded that the MFQ–FF, despite being short and easy to administer, provides a reliable and valid assessment of friendship quality.

References

Authors: Mendelson M. J. & Aboud F.
Greek Adaptation: Pezirkianidis & Stalikas A.