Case File 242 · Investigation Psychology

What Is Selective Memory?

"Selective memory" is the everyday phrase for remembering some things clearly while forgetting or overlooking others. It is not a medical condition, and it is not proof that someone is being dishonest

By Murder Book Editorial TeamPublished by Gungrounds, the studio making Murder BookPublished 3 October 2026Updated 3 October 2026

"Selective memory" is the everyday phrase for remembering some things clearly while forgetting or overlooking others. It is not a medical condition, and it is not proof that someone is being dishonest. It describes something true of all human memory: we cannot and do not record everything, so what we end up remembering is always a selection. Attention decides what gets encoded in the first place, the act of retrieval can push competing memories out of reach, and in some cases people can deliberately steer their minds away from an unwanted memory. Each of these is a normal feature of a reconstructive memory system. When someone remembers one part of an event and not another, the ordinary explanation is how memory works, not a lie.

Key takeaways

"Selective memory" is a casual term for the normal fact that people remember some things and forget others.
All memory is selective: attention limits what is encoded, and nobody stores a complete record of an event.
Retrieving one memory can suppress related ones, a measured effect called retrieval-induced forgetting.
People can intentionally suppress unwanted memories to some degree, which research calls motivated forgetting.
Selective memory is not evidence of deception; honest people routinely recall events patchily and unevenly.

What do people mean by "selective memory"?

In conversation, "selective memory" is usually a mild accusation: the suggestion that someone remembers the parts of a story that suit them and conveniently forgets the rest. It implies choice, and often bad faith.

Psychology uses the idea more neutrally. Memory is selective at every stage, from what we notice, to what we store, to what we can later retrieve. Much of that selection is automatic and outside anyone's control. So while the phrase can describe genuine self-serving recall, it far more often describes the ordinary, unavoidable gaps in any honest account. Treating patchy memory as a sign of guilt mistakes a universal feature of the mind for a personal failing.

Why is all memory selective?

The first filter is attention. People can only encode a fraction of what is happening around them, and they tend to encode what they are focused on, what is emotionally striking, or what seems important at the time. Everything else is thin or absent from the start. You cannot later remember a detail you never encoded, no matter how sincere you are.

The second filter is reconstruction. As Loftus and Palmer showed in 1974, memory is rebuilt rather than replayed, and the rebuilt version is shaped by later questions and expectations. Gaps get smoothed over, some elements are emphasised while others fade, and the balance of what stands out can shift again every time the event is recalled. The same person may foreground different details on different days, depending on mood, context and what they have been asked. The outcome is an account that is inevitably partial. This is why two honest people at the same event can remember different parts of it, and why a single person can hold vivid detail about one moment and near-nothing about the next. For how this affects testimony, see how reliable eyewitness testimony is.

Can remembering one thing make you forget another?

Surprisingly, yes. The act of recalling part of an experience can actively suppress related, unretrieved parts. This is retrieval-induced forgetting, demonstrated by Anderson, Bjork and Bjork in a 1994 study in the Journal of Experimental Psychology: Learning, Memory, and Cognition. When participants repeatedly practised retrieving some items from a studied category, their later recall of the other, unpractised items from that same category was impaired, compared with items from categories they had not practised at all.

The practical implication is important for understanding selective memory. Going over one strand of an event, perhaps the part a person has been asked about most, can make the neighbouring details harder to reach. So a witness who has rehearsed one portion of their account may genuinely struggle with the rest, not because they are hiding it, but because remembering is itself a cause of forgetting. This connects to whether repeated recall improves or distorts memory.

Can people choose not to remember?

To a degree. Research on motivated forgetting shows that people can intentionally reduce their memory for unwanted material. Benoit and Anderson, writing in Neuron in 2012, described two mechanisms the brain uses to keep an unwanted memory out of awareness: directly suppressing the retrieval process, and occupying the mind with a competing thought instead. Both reduced later memory for the suppressed item.

This is real, but it is limited and specific. It does not mean a person can flick a switch and erase a whole event, nor that forgetting under questioning is usually deliberate. Most selective memory is passive, the ordinary product of attention and retrieval, rather than an act of will. And crucially, even deliberate avoidance of a painful memory is not the same as lying about facts; trauma and distress commonly make people turn away from exactly the events they are being asked to describe.

Is selective memory a sign of lying?

No. This is the most common misreading of the term. Because deception research consistently finds that behavioural and memory cues are weak guides to honesty, a patchy or one-sided recollection cannot carry the weight people often put on it. Bond and DePaulo's 2006 review found observers judge truth and lies at only about 54% accuracy, and a gap in someone's memory is not among the reliable signals of deceit.

Honest people forget inconvenient details all the time, and remember flattering ones, without any intent to mislead. The pattern that looks like "conveniently selective" memory is produced by attention, emotion, retrieval-induced forgetting and reconstruction in people with nothing to hide. For the specific question of whether gaps imply dishonesty, see whether selective memory is evidence of lying, and for the related response under questioning, why people say "I don't remember" during questioning. The sound approach is to treat a gap as something to explore and corroborate, never as proof of guilt.

Is there a game that explores selective memory?

Murder Book: The Art of Interrogation, an upcoming narrative interrogation game from Gungrounds, is built around unreliable accounts, where what a person remembers, forgets or leaves out is the heart of each case. Rather than treating a gap in a story as an automatic confession, it asks you to weigh narrative gaps against evidence and work out whether a missing detail points to deception or to the ordinary limits of memory. Its press kit names Narrative Gaps and Avoidance among the behaviours players examine.

That reflects the research here: selective memory is how everyone remembers, so a gap is a question, not a verdict. Cases are designed for focused 5–10-minute sessions. Murder Book is in development for PC (Steam) and mobile, with release currently planned for the end of Q2 2027.

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