Two Types of Monocular Depth Cues Are __________ and __________

Depth perception refers to the ability to come across the world in 3D and judge how far away/close objects are from and to usa. This sentence is very important for navigating everyday life. How we move from 1 indicate to another relies quite heavily on our ability to perceive depth, and fifty-fifty picking up an object such equally your pencil relies on the ability to judge depth.

For case, if nosotros were crossing the road and weren’t able to judge how far abroad a car is, it would exist a chip of a disaster.

There are two kinds of depth cues:

  1. Monocular depth cues
  2. Binocular depth cues

Monocular Depth Cues Definition Psychology

Monocular depth cues in psychology tin be defined equally:

Monocular depth cues: information about
depth that can be judged using
simply 1 eye.
Monocular depth cues can be used in pictures, and so a lot of monocular depth cues are used in art to give viewers a sense of depth.

Binocular Depth Cues Definition Psychology

Binocular depth cues in psychology can be defined as:

Binocular depth cues: information about depth that uses both optics to encounter and sympathize 3D space. This is a lot easier for our brains than monocular depth cues.

The deviation between monocular and binocular depth cues is that monocular depth cues use one eye to judge depth, and binocular depth cues apply both eyes to perceive depth.

Types of Monocular Depth Cues

At that place are four monocular depth cues you lot will need to know for GCSE psychology. These are:

  1. Height in airplane
  2. Relative size
  3. Apoplexy
  4. Linear perspective.

Height in airplane

This is when objects that are placed to a higher place appear or would be interpreted equally being further away. Have a look at the

depth cues example beneath
, notation that the house that is placed higher would exist interpreted as being further away from us, and the firm lower down would exist seen as being closer to us.

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Monocular depth cues [+] height in plane [+] StudySmarter
Case of top in plane, Erika Hae, StudySmarter Originals

Relative size

If at that place are two objects that are the same size (east.g., two trees of the same size) the object that is closer volition look larger. Have a look at the

depth cues example below
, tree number one seems closer because it is
larger, and tree number two seems further away because information technology is

Monocular depth cues [+] relative size [+] StudySmarter
Example of relative size, Erika Hae, StudySmarter Originals


This is when i object partially hides another object. The object in forepart that is overlapping the other is perceived to be closer than the one that is beingness partially hidden. Accept a look at the monocular
depth cues case below,

the rectangle appears closer as it is overlapping and partially hiding the triangle.

monocular depth cues [+] occlusion [+] StudySmarter
Example of occlusion, Erika Hae, StudySmarter Originals

Linear perspective

This is when two parallel lines come together at some point in the horizon; the closer together the two lines are the further abroad they seem. A mutual case is a road that appears to converge in the altitude. The closer the parallel lines announced to become, the farther abroad it seems.

monocular depth cues [+] linear perspective [+] StudySmarter
A road that appears to converge in the distance,

Types of binocular depth cues

There are ii types of binocular depth cues, these are:

  1. Convergence
  2. Retinal disparity.


In order to present images of what nosotros meet onto the retinas (the layer of tissue at the back of the eyes that sense lite and transports images to the encephalon), the two eyes must rotate inwards toward each other. The closer an object is, the more than the optics must rotate.

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The brain uses this information (corporeality of rotation) as a cue to construe how far away an object is, by detecting muscle differences the convergence causes in our eyes, and analysing that information to decide the depth. Information technology’s a feedback tool, in a sense.

A binocular depth cues example: if yous were to hold a marble in front end of your face and move it closer to your face, eventually, your eyes would brainstorm to cross. Your brain would and then be able to tell how shut the object was to your face by detecting how much your optics were ‘crossing’, using the muscles.

Crosseyed Binocular Depth Cues StudySmarter
A women crossing her optics,

Retinal disparity

When we meet something, slightly dissimilar images of what we encounter are sent to each retina (as our optics are autonomously so each eye sees things from a slightly different angle). However, we don’t view the world every bit a series of two images. This is because the brain processes the degree of divergence or disparity between the two images and assembles 1 prototype for u.s. that has depth, height, and width.

The disparity between the two images allows the brain to summate how far away an object is. An object that’due south close has a large disparity. An object that’southward far abroad has a small-scale disparity.

A exam you can do that as well brings home the concept of large and small-scale disparity is a test with your pollex. Give yourself a thumbs upwards (yay) and and so extend your arm so the thumbs up is far away from you. Close one eye and so the other and then you’re only looking at your thumb with the left heart, and so the correct, then the left, etc. You’ll notice that your thumb moves back and forth a petty fleck (your encephalon thinks the thumb isn’t moving much and so it must exist far away, i.e., small disparity).

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At present put your thumb super close to yous (but non so shut it’due south blurry) and do the same thing, closing one eye and and then the other. You’ll notice that your thumb moves back and forth a lot (your brain thinks the thumb is moving a lot and so the pollex must exist closer to you i.e., large disparity).

Animals that have a larger separation betwixt the eyes, such as hammerhead sharks, take much greater depth perception.

Binocular depth cues – Central takeaways

  • Depth perception refers to the ability to see the world in 3 Dimensions and judge how far away objects are from u.s.a..
  • Nosotros are able to guess depth using depth cues; at that place are two kinds of depth cues: monocular depth cues and binocular depth cues.
  • Monocular depth cues are information near depth that can exist judged using only one middle. Some of these cues are
    height in plane, relative size, apoplexy, and linear perspective
  • Binocular depth cues are information about depth that uses
    both optics. There are ii types of binocular depth cues:
    convergence and retinal disparity.

Two Types of Monocular Depth Cues Are __________ and __________


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