Hand-rolled base-R implementation. When the psych package is installed,
results agree with psych::alpha()$total to numerical precision.
Usage
morie_psymet_alpha(data, ci = 0.95)
Arguments
- data
Numeric matrix or data.frame: items as columns, respondents as rows.
- ci
Confidence level (default 0.95).
Value
A list with components raw, std, avgr, k, n, ci_lo, ci_hi.