How to report reliability in APA 7
Internal-consistency reliability is often reported with Cronbach's alpha or McDonald's omega. Name the coefficient and provide its value: Cronbach's α = .87 or McDonald's ω = .88. Alpha and omega are Greek letters and are not italicized. Their values are bounded and therefore omit the leading zero. Two decimal places are a common narrative default, but use additional precision if it is substantively important or customary in your field.
Do not label alpha as a measure of validity or treat a high value as proof that a scale is unidimensional. Reliability belongs to scores in a particular sample, not permanently to an instrument. When useful, report the number of items and explain how the items were scored. Common presentation errors include italicizing the Greek symbol, writing a leading zero, omitting the coefficient name, or mixing alpha and omega terminology. If items were deleted, reverse-scored, or analyzed in subscales, describe those decisions in the surrounding methods or results text. This formatter can append the item count, but a complete report may also discuss confidence intervals or reliability by subgroup when those details matter.
Worked example
A 12-item questionnaire produced a Cronbach's alpha of .87 in the analyzed sample.
Cronbach's α = .87 for the 12-item scale.