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Two viewpoints help build a sense of depth

Each eye views a nearby object from a slightly different position. The difference contributes to depth perception alongside cues, such as overlap and perspective, that can also be present in one image.

3–5 min

Questions you could explore

  • How does viewpoint difference change with an object's distance?
  • What depth information can a flat photograph still contain?

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Psychology

Can an option nobody wants change what people choose?

Choosing between two offers can feel different when a third appears beside them. A decoy is less attractive than one option on the relevant features, but its presence does not reliably change every decision.

5–7 min

Can an option nobody wants change what people choose?

Psychology5–7 minChoosing between two offers can feel different when a third appears beside them. A decoy is less attractive than one option on the relevant features, but its presence does not reliably change every decision.

How can you miss something that is right in front of you?

Psychology3–5 minLooking at a scene does not mean noticing everything in it. When attention is occupied by one task, something plainly visible can go unreported, a pattern called inattentional blindness.

Psychology

When a question reshapes a memory

Research on eyewitness reports separates what someone originally saw from information introduced afterward, making wording part of the evidence problem.

3–7 min

When a question reshapes a memory

Psychology3–7 minResearch on eyewitness reports separates what someone originally saw from information introduced afterward, making wording part of the evidence problem.

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