Negative implicit in-group stereotypes of Chinese male drug abusers: evidence from ERP

Abstract

Psychological dependence is the most important factor leading to relapse, few studies have examined whether in-group stereotypes exist in drug abusers, while it's helpful for drug abusers in getting rid of psychological dependence. To investigate the presence of in-group stereotypes and the neural mechanisms in drug abusers, two experiments were designed in this study. Experiment 1 used a classification–verification paradigm and Experiment 2 used The Extrinsic Affect Simon Task (EAST), simultaneous collection of EEG data from China. 18 and 17 males were analyzed respectively in Experiment 1 and 2. The results in Experiment 1 showed that (1) there was no significant difference in reaction times or N400 amplitude between the condition "Drug abusers-Negative words" and the condition "Drug abusers-Positive words". In Experiment 2, we found that (2) participants in the condition "Drug abusers-Negative words" scored higher in accuracy rates than in the condition "Drug abusers-Positive words". (3) Participants in the condition "Drug abusers-Negative words" were shorter than "Drug abusers-Positive words" in reaction times (RTs). (4) Participants in the condition "Drug abusers-Negative words" were lower than "Drug abusers-Positive words" in the peak of N400. The conclusion is that there are significant negative implicit in-group stereotypes among Chinese male drug abusers. The experimental results and the uniqueness of Chinese male drug abusers in this study were discussed.

Implicit weight-stereotypical bias of Chinese college students: Evidence from Evidence from event-related potentials (ERPs)

“…Similarly, some research has uncovered that the violation of social information, such as social norm (Mu, Kitayama, Han, & Gelfand, 2015), and social con icts (Huang, Kendrick, & Yu, 2014), would elicit a larger N400. In addition, empirical studies have found that stereotypes, including in-group (Zeng et al, 2022) and rural migrant worker stereotype (Wang et al, 2011), is no exception to this result, suggesting that violation of stereotype does trigger an N400 amplitude (Wang et al,2017). Thus, the N400 component may be used as an indicator of pro-thin and pro-fat implicit preference of cognitive neural mechanisms in individuals with implicit weight-stereotypical bias.…”

Rapid Separation and Detection of Drugs in Complex Biological Matrix Using TD-CDI Mass Spectrometer

“…The development of pharmaceutical technology has led to an increase in the variety, forms, and functions of drugs. However, the misuse of drugs such as opium, heroin, methamphetamine, and morphine can result in severe physical and mental dependence [ 1 ]. Drug abuse can cause damage to various organ systems, including the nervous system, cardiovascular system, and respiratory system [ 2 ].…”