Left-Hand–Right-Hand Case Method

Definition

Participants describe a real or anticipated difficult conversation as a two-column document: the right-hand column is a script of what was said (or predicted to be said), written "in the form of a play"; the left-hand column, running alongside it line by line, records the thoughts and feelings the writer had at that moment but chose not to voice. The method requires no explanation of why something was withheld — only an honest record that it was. Argyris reports using it with over 10,000 people across three decades, and it typically takes about half an hour to produce.

In the Book

Case 1 (Chapter 2) shows a superior, S, and subordinate, O, arguing entirely in technical terms about a compiler/debugger delay. Read on its own, the right-hand column looks like a legitimate engineering disagreement. The left-hand column tells a different story: S's real, unspoken belief throughout is that "the group should accept responsibility" and that O is "avoiding responsibility" — a leadership and accountability issue S never raises, choosing instead to keep escalating technical counterarguments (cheaper disks, other interacting components) as indirect proxies for the real complaint. The book uses this to show how the two-column format exposes a conversation's real subject even when the transcript alone would never reveal it — S "acted in ways that drove the human problems underground... in order to minimize making O defensive," and O, for his part, stayed at the technical level and "appeared to be designedly sidestepping" the underlying issue.

The five other cases in the chapter (advocacy without evidence, "easing in" to deliver negative feedback, a CEO-CIO conflict, MBA students refusing to update their position) all use the same instrument to make visible what a normal transcript hides: the self-censored, defensively reasoned layer running underneath the words actually spoken.

Why It Matters

The method converts an invisible, deniable phenomenon — what someone privately thought but didn't say — into a comparable, discussable artifact, without requiring anyone to explain or justify the withholding. That turns "you're not being honest with me" from an accusation into data: a side-by-side record either party (or a group, or a coach) can examine to locate exactly where and why a conversation diverged from what either side actually believed was going on. It generalizes to any domain where the gap between spoken content and private assessment is the thing actually driving the outcome.