Steady-state visually evoked potential is modulated by the difference of recognition condition.

Tetsuto Minami,Kazuki Azuma,Shigeki Nakauchi,Michael J Proulx

doi:10.1371/journal.pone.0235309

Abstract

Recent researches revealed that the EEG component caused by the flickering visual stimulus, which is called steady-state visually evoked potential (SSVEP), might be a potential index for object recognition. This study examined whether SSVEP reflects different states during object recognition. In one trial, a binary image (BI), which is difficult to recognize, was followed by a grayscale image (GI) of the same object as the answer. Both BI and GI were presented in a flickering manner at a frequency of 7.5 Hz. Participants were first asked to answer whether they could recognize BI. Then, after GI was shown, participants were requested to answer whether they recognized it. We analyzed the evoked and induced component of SSVEPs from the two recognition conditions. As a result, the SSVEPs to BI were significantly larger than that to GI. In addition, induced component to GI after the BI was unrecognized was smaller than after the BI was recognized. The present data provide evidence that SSVEPs reflect a transition of cognitive state to ambiguous figures is reflected.

Highlights

We show individually different interest and appeal towards several objects
Responses of recognition to grayscale image (GI) images were divided to two patterns: recognition after no recognition (NR) or recognition (RR)
There is no significant difference between the numbers of NR and RR responses ((t(10) = 1.37, p = .200, d = 0.41)).After the trial rejection based on EEG artifacts, the average ratios of responses of no-recognition (N) and recognition (R) to binary image (BI) images were 0.546 ± 0.097, and 0.454 ± 0.097, respectively

Summary

Introduction

A trigger such as a hint changes the interest and understanding of the same object in one person. Such a transition of cognitive state cannot be detected except the person him/herself, so an objective index is needed for its detection. One of such rapid cognitive change is the Eureka effect, the form of one-shot learning [1]. Our previous study showed that beta-band activity is related to the transition of cognitive state using 2-tone images [6]

Objectives

Methods

Results

Conclusion