Invert Scale

Reverse-scores the selected columns: each value x becomes reference − x. With no reference given, it uses max + min of the column, so a 1–5 Likert item maps 1↔5, 2↔4, 3↔3. Use it to fix reverse-keyed items before building a scale.

By default the inverted values are added as new … (inverted) columns, leaving the originals in place. Tick Replace column in-place to overwrite each selected column instead, keeping its name (no copy).