Attention Cycles Identified

Research suggests that human attention operates in cycles, shifting approximately seven to ten times per second. This rhythmic occurrence is proposed to be a mechanism that prevents individuals from becoming excessively focused on a single environmental element, potentially aiding survival in ancestral environments by allowing for simultaneous monitoring of surroundings while engaged in tasks.

However, in contemporary environments characterized by numerous screens, digital alerts, and visual stimuli, these attention shifts may increase susceptibility to distractions.

Ian Fiebelkorn, PhD, assistant professor of Neuroscience at the Del Monte Institute for Neuroscience at the University of Rochester and senior author of the study, noted that while this trait was beneficial for ancestors, it may be a contributing factor to distraction in modern settings.

Study Methodology and Findings

Zach Redding, PhD, a postdoctoral fellow in the Fiebelkorn lab and the study's first author, utilized an electroencephalogram (EEG) to monitor brain signals in 40 participants. Participants were instructed to focus on a dim grey square at the center of a computer screen while colored dots functioned as distractors. Eye movements were excluded from the data to ensure the findings reflected internal shifts in attention.

EEG recordings indicated rhythmic patterns correlating with periods when attention was more prone to shifting towards a distractor. These rhythmic shifts occurred at a frequency of approximately seven to ten times per second and were associated with alternating phases of enhanced and reduced target detection. Periods of reduced target detection corresponded with increased susceptibility to distractors.

Implications for Cognitive Flexibility

These findings may offer insights into conditions such as Attention-Deficit/Hyperactivity Disorder (ADHD), potentially explaining phenomena like hyper-focus or increased distractibility.

Ian Fiebelkorn stated that the typical brain rhythmically alternates between states that prioritize either increased processing at the current focus of attention or an increased likelihood of reallocating attentional resources.

It is hypothesized that individuals with ADHD may exhibit less frequent alternation between these states, potentially leading to a reduction in cognitive flexibility. This research may contribute to the development of new strategies aimed at improving focus.

Other authors involved in the study include Yun Ding, PhD. The research received support from the National Institutes of Health, the National Science Foundation, and the Searle Scholars Program.