What is imagination inflation?

Elizabeth Loftus, answered from the texts and cited to the page.

Elizabeth Loftus answers

Imagination inflation is the finding that simply imagining a childhood event — one you have no memory of — increases your subjective confidence that it actually happened to you.¹ The procedure that established this is worth knowing in some detail. Subjects rated a long list of possible childhood events on how likely each was to have occurred to them personally.²

Two weeks later, they were guided through imagination exercises for some of the events they had said did not happen — the broken-window scenario being the most illustrative: running toward a window, tripping, reaching out, hand going through the glass.³ Then they rated the full list a second time. The result was consistent across all eight events we tested: imagining the incident produced a measurable increase in confidence that it had really taken place.⁴

Twenty-four percent of participants who imagined the broken-window scenario later reported increased confidence it had occurred, compared to twelve percent of those who were not asked to imagine it at all.⁵ The most plausible mechanism is source confusion. The act of imagination makes the event feel familiar, and that feeling of familiarity gets misattributed — not to the imagination exercise that just happened, but to an actual childhood memory.⁶

This is especially acute for distant childhood experiences, where the original encoding, if there was any, has long since faded. Why does it matter? Because imagination is not a neutral tool. Law enforcement has used repeated directed imagination to extract confessions, and some therapists have explicitly instructed clients to imagine abusive childhood events as a technique for recovering hidden memories — without worrying, in one published formulation, about accuracy or whether the ideas make sense.⁷

If counterfactual imagining can shift what people believe happened to them, that is not merely a laboratory curiosity. It is a partial account of how false memories get built.

Sources

1. a goal of the present research was to determine whether imagination leads to increased confidence that the event occurred. Suppose imagining a childhood event does promote this increased confidence (which we term *imagination inflation*)

   Imagination Inflation- Imagining a childhood event inflates confidence that it occurred, p. 2

2. subjects were asked about a long list of possible childhood events (e.g., broke a window with your hand) and they told us the likelihood that these events had happened to them as a child.

   Manufacturing false memories using bits of reality (In L M Reder (Ed.) Implicit memory and metacognition Mahwah, NJ- Erlbaum, pp 195-220, 1996), pp. 21–22

3. Imagine that it is after school and you are playing in the house... As you're falling you reach out to catch yourself and your hand goes through the window.

   Manufacturing false memories using bits of reality (In L M Reder (Ed.) Implicit memory and metacognition Mahwah, NJ- Erlbaum, pp 195-220, 1996), pp. 21–22

4. We found this 'imagination inflation' effect in each of the eight events that participants were asked to imagine.

   Creating false memories, p. 5

5. 24 percent of the participants who imagined the broken-window scenario later reported an increase in confidence that the event had occurred, whereas only 12 percent of those who were not asked to imagine the incident reported an increase in the likelihood that it had taken place.

   Creating false memories, p. 5

6. An obvious one is that an act of imagination simply makes the event seem more familiar and that familiarity is mistakenly related to childhood memories rather than to the act of imagination. Such source confusion—when a person does not remember the source of information—can be especially acute for the distant experiences of childhood.

   Creating false memories, p. 5

7. some mental health professionals encourage a client to imagine an abusive childhood event as a way of recovering hidden memories. Maltz's (1991) specific technique is just one of many published examples: 'Spend time imagining that you were sexually abused, without worrying about accuracy, proving anything, or having your ideas make sense.'

   Imagination Inflation- Imagining a childhood event inflates confidence that it occurred, p. 2