We have talked about pop-out before. The phenomenon is nearly self-explanatory: consider the two sets of dots in the figure below. There are 18 dots on the left and 150 on the right. In each array, there is a single red dot: what is your intuition about how long it would take to detect the […]
Visual Search
Visual search can be a very daunting task, whether it’s looking for keys among a pile of office supplies on a desk, or looking for a dime among a bunch of coins in your purse. It seems like no matter how many times you have checked and re-checked certain locations, the object of your affection […]
Finding an image among other images is a basic task—visual search—has been a staple of the vision scientist’s toolkit for decades. Even if one has no interest in visual search itself, the basic paradigm of searching for a target among an array of images is wonderfully useful for investigating memory, attention, and individual differences. In […]
We keep track of multiple objects every day. When we drive, we need to keep track of the cyclist near the curb, the dump truck bearing down on us from behind, and the lost tourist in front of us who is signaling turns at random. When we are on the beach on a family outing, […]
How many things can we attend to simultaneously? Imagine being an air traffic controller and you are monitoring O’Hare arrivals on the day before Thanksgiving. How many aircraft can you attend to simultaneously? Or imagine watching a flock of grazing impalas in Krueger National Park or the Serengeti while a pride of lions is casually […]
Better get those headphones: We can’t really ignore task-related noise Like many people, I work in an open office. Workers increasingly find themselves in open offices as companies (and universities) switch to these layouts in a bid to maximize space and reduce building costs. In my case, I work remotely but share a local co-working […]
Attention guides human perception, memory, and action in intriguing ways. Some time ago on this blog we learned that visual search can be directed by conceptual information: Saying or reading a word such as “tomato” makes it easier to find red things. We also learned on this blog that looking at a tomato can help you touch […]
You are looking at a display of 17 green blobs and one red blob. Your task is to find the red blob and press a key as soon as you have found it. What could be simpler than this visual search task? Its apparent simplicity notwithstanding, this task has opened a fascinating and sometimes complex window […]
Imagine the following dystopian job: You are working in a factory, and your task is to look for that matching sock so the pair can be packaged together. To make things worse, you are given another sock every few seconds, together with a new drawer in which to look for its twin. To manage the […]