Overview of Perception

This text provides examples of problems with messages and how we can provide cues to the recipients. It addresses the conventions we use when we communicate.

Gestalt Principles of Organization

In the early twentieth century, some psychologists thought we could examine parts of things, much as a scientist would examine an atom, and make a whole and complete picture regardless of context. Their theory was that the setting and scene would not influence the picture or perspective. In response to this view, other psychologists developed what they called Gestalt principles - the German word "Gestalt" referring to the unified whole. According to Gestalt theory, context matters, and the whole is greater than the sum of the parts. What you see and how you see it matters, and you yourself play a role in that perception of organization.

In the fifth of the Note 3.1 "Introductory Exercises" for this chapter, you were asked to connect nine dots with four straight lines, without retracing any line. Did you find a solution? (A common solution appears at the end of this chapter). The key to solving this puzzle is finding a way to "think outside the box" - in this case, to take your pencil outside the implied square, or box, formed by the three rows of dots. The physical configuration of the dots contributed to the illusion of the "box". But in fact there is no box, and our tendency to see one where one does not exist creates barriers to solving the puzzle. Gestalt theory states that we will perceive the nine dots as belonging to a whole - a group or set having a certain shape - whether or not that whole actually exists.

Gestalt principles apply not only to images or objects, but also to ideas and concepts. You can associate two or more bits of information in predictable ways, but your perspective can influence your view of the overall idea. We don't always have all the information we need to draw a conclusion, literally drawing a series of relationships to form a whole picture in our minds, so we often fill in the gaps. We guess and make logical leaps, even suspend disbelief, all in an effort to make sense of our experiences.

In your presentations, if you jump from topic to topic or go off on a tangent, what happens to the listener's ability to listen and follow you effectively? Why make barriers for your audience when you've worked so hard to get their attention? How does this relate to Gestalt principles? By failing to recognize our natural tendency to want ideas, shapes, or words to make sense, the author is confusing the reader. What happens when the reader is confused? He or she moves on to something else, and leaves your writing behind. The opposite of clear and concise, confused, and poorly organized writing can distract and defeat even the most motivated of readers. Table 3.2 "Gestalt Principles of Organization" lists some of the Gestalt organization principles.

Table 3.2 Gestalt Principles of Organization

Principle Definition Example
Proximity Organization based on relationship of space to objects Next to me on the beach, I see my daughter playing with her pail and shovel; in the middle distance, a trio of kayakers paddle by; farther away, I see several power boats, and in the far distance, the green shore of Long Island.
Continuity Drawing connections between things that occur in sequence I am beginning to notice a pattern in the absentee rate in our department. For the past year, more workers have been absent on the first Friday of the month than on other days. I expect we will again have many absences next Friday, as it is the first Friday of the month.
Similarity Grouping things or concepts by properties they share

To make appliquéd candles, you will need the following:

  1. Decorative material to appliqué: floral (fresh flowers, pine needles, or leaves), homey (dried beans or grains) or folksy (small nuts and bolts)
  2. Candle body: fat candles (at least 4" diameter to keep dried flowers away from flame), natural colored wax (sheets or chunks of beeswax or paraffin)
  3. Tools: a microwave flower press, a ½-inch paintbrush, a tin pie plate, a chip carving knife or v-tool
Uniformity/Homogeneity Noting ways in which concepts or objects are alike Armored personnel carriers include the Stryker, LAV, Pandur, M113 Armored Personnel Carrier, Amphibious Assault Vehicle, Expeditionary Fighting Vehicle, Grizzly APC, Rhino Runner, Bison (armored personnel carrier), and Mamba APC.
Figure and Ground Emphasis on a single item that stands out from its surroundings On a rock in Copenhagen Harbor stands the small statue of The Little Mermaid, a memorial to one of Denmark’s most beloved citizens, Hans Christian Andersen.
Symmetry Balancing objects or ideas equally from one side to the other Representing the conservative viewpoint was Wall Street Journal correspondent John Emshwiller; the liberal viewpoint was argued by New York Timescolumnist Paul Krugman.
Closure Tendency to use previous knowledge to fill in the gaps in an incomplete idea or picture The wording of the memo was, "It is important for all employees to submit their health insurance enrollment selections no than November 1," but everyone understood that it should have said, "no later than November 1".


Let's examine some of the commonly used Gestalt principles: proximity, continuation, similarity, and closure.

It makes sense that we would focus first on things around us and the degree to which they are close to us and to each other. Proximity is the perceptual organization of information based on the physical relationship of space to objects. In creating a scene for a play or movie, a stage designer knows that the audience will tend to pay attention to objects in the foreground, unless special emphasis is added to objects farther away. This principle extends to people and daily life. Just because someone is walking down the street next to someone else, this does not necessarily mean they have a connection to each other - they are simply in close proximity.

Graph with two intersecting curved lines

Figure 3.5 Continuity

We also see a similar tendency in the principle of continuity. We like things to be orderly, and our brain will see lines and movement where none exist. Examine Figure 3.5 "Continuity". What do you see? Do you perceive two lines crossing one another? Or an X? The principle of continuity predicts that you would demonstrate a tendency to perceive continuous figures. The two lines cross one another, and you might even say from top to bottom or the reverse, when there is no motion indicated.

Continuity can also lead to a well-known logical fallacy, or false belief, involving sequence and cause-effect relationships. If something happens after something else, does that mean that the first event caused the second event? You wish for rain and it rains. Connected? Logic and common sense would say no. You have a dream about a plane crash, and the next day there is a major airline crash. Did your dream cause the crash? Obviously not.

When objects or events are similar, we tend to group them together in our minds, again making the assumption that they are related by their common characteristics. Similarity is the perceptual organization of information based on perceived points of common characteristics across distinct items. For example, a horse, a mule, and a donkey are distinct, but we perceive them as being similar to one another.

The principle of closure underscores our tendency to use previous knowledge to fill in the gaps in an incomplete idea or picture. If you are talking to a friend on your cell phone and the connection breaks up for a few seconds, you may miss some words, but you can grasp the main idea by automatically guessing what was said. You do this based on your previous history of communicating with your friend on similar topics. Do you always guess correctly? Of course not. Look at Figure 3.6.


Figure 3.6

Do you see a ring of Pac-Man-like circles?

When we say we see a star, we don't really see one because there is no star. The five Pac-Man shapes in that arrangement, however, allow our mind to say, "If this was connected to this and that was connected to that, there would be a star". Sometimes the sense we make does not match reality, and we see a star where there is no star.

Sometimes we "fill in the blanks" without even being aware of it. When we speak on a topic and fail to clearly articulate a point or substantiate an assertion, we leave a "hole" in our presentation that the listener may or may not be aware of, but will predictably fill. This tendency to jump to conclusions may seem like a disadvantage, but it is only a disadvantage if you are unaware of it. In fact, it's a positive ability that allows us to infer and guess correctly, often in times of crisis when time is limited. But we don't always guess correctly. If your goal is to communicate your message to the audience, then by definition you don't want a "pothole" to interrupt, distract, or create a barrier that leads to misinterpretation.