Common fate and similarity - the viewer groups what they see
Your viewers don’t just see what’s in your photo — they interpret it. They group, separate, compare, and connect the elements in front of them. As a photographer, you can guide those decisions with two simple but powerful principles: common fate and similarity.
Both ideas come from Gestalt psychology, and they help explain how people visually make sense of complex scenes. In smartphone photography, they give you tools to shape visual structure, enhance storytelling, and keep your images clean and clear — especially when working with multiple elements or people.
What is similarity?
Similarity means that we group together things that look alike. That could be:
Objects of the same color
Repeated shapes or sizes
Matching clothing or accessories
Identical or mirrored forms
When things look alike, we assume they belong together — even if they’re spaced apart. It’s a shortcut our brain uses to organize visual information.
What is common fate?
Common fate means that we group things that move (or appear to move) in the same direction or rhythm. For example:
A line of people walking together
Cars moving the same way
Birds flying in a formation
Repeated gestures or aligned poses
Even in still photography, implied motion creates grouping — and tells the viewer what elements share a purpose or story.
See article: Using Implied Line of Sight in Smartphone Photography
Why these principles matter
Create visual unity: Group related elements for stronger storytelling
Guide attention: Similarity and shared motion draw the eye naturally
Reduce confusion: Help the viewer see structure in busy scenes
Support narrative: Show relationship, connection, or rhythm
In both cases, you’re helping the viewer understand what belongs together.
How to use similarity in smartphone photography
Look for repeated forms
uildings, windows, signs, people, or objects that echo each other make natural visual groups.Use matching colors
Elements with the same hue — especially in a neutral environment — immediately feel connected.Match size or scale
Two figures of similar size in the frame will be grouped more easily than one large and one tiny figure.Control spacing and repetition
Even spacing between similar items adds calm and order. Irregular spacing creates interest or contrast.
How to use common fate in smartphone photography
Look for movement
People walking the same direction, cars turning together, birds in flight — all imply a shared story.Capture gesture
Subjects with matching poses or gestures feel unified — even if they’re not identical.Use composition to imply motion
A row of elements that narrow into the distance suggests movement — even if it’s still.Tell a story through flow
Movement direction adds emotional meaning — left to right feels natural and progressive, right to left feels unusual or tense.
When to use similarity and common fate
In group portraits, street scenes, or event photography
In abstract compositions with repeated forms
When you want to highlight harmony, rhythm, or shared experience
To create a sense of pattern, repetition, or unity
When not to rely on them
In documentary work where randomness tells a truer story
When disconnection or difference is the point
If similarity makes your photo feel repetitive or dull
Balance similarity with contrast — both are useful tools.
Did you know?
These principles come from the Gestalt school of visual psychology, developed in the early 20th century. “Similarity” and “common fate” are two of the original six grouping principles. They’ve shaped everything from logo design to interface layouts — and they apply just as powerfully to how we view photos, even in a split second.
Tips for stronger visual grouping
Group with intent: Don’t let similar objects appear by accident — make their position matter
Shoot from above or at angles: Emphasize movement or spacing between similar subjects
Use symmetry and rhythm: Similarity loves structure — support it with gridlines or repeated framing
Pair with negative space: Let the similarity breathe
Common mistakes
Unintended grouping — where unrelated elements look too similar or close
Overreliance — when everything looks the same and loses impact
Mismatched spacing — which breaks the illusion of unity
Ignoring background — similar tones or shapes can distract from your intended group
Use similarity to unify — and common fate to tell a shared story.
Related techniques
Use the search bar above to search for any composition technique, including the below:
Repetition and pattern
Proximity
Visual hierarchy
Diminishing perspective (when movement aligns)
Conclusion
Similarity and common fate help your viewers make sense of the scene. With a smartphone and an eye for pattern or motion, you can turn clutter into clarity — and create photos that feel balanced, intentional, and story-driven.
📘 These visual grouping principles — and many others — are taught in Stronger Photo Composition - 4-Step System. Learn to see like a designer, shoot like a storyteller, and compose like a pro.
👉 Buy the physical book or PDF version of Stronger Photo Composition - 4-Step System
