The impact and mechanisms of reward anticipation on episodic memory in school-aged children (6-9 years old)

(1) Raw data upload format: This study collected valid data from 31 children aged 6-9 years old, and the folder name is "31 Subject Raw Data". This folder is further divided into 31 folders, with each subject's behavior and EEG data placed separately in a folder named "Subject Number", such as "subj1". Each subject's independent folder contains 5 folders, each containing 4 blocks of EEG data, named "Subject Number: Which Block", and 1 behavior data folder named "Subject Number: Behavior".(2) Experimental procedure: This study uses the learning recognition paradigm and ERP measurement with high temporal resolution to investigate the impact of reward expectations on episodic memory in 6-9-year-old school aged children and its potential mechanisms. During the learning phase, a reward based coding task is used. In each trial, reward cues (indicating whether the subject has a reward or no reward in the current trial, and whether they can receive a reward depends on their subsequent recognition scores) and learning items (requiring the subject to memorize object images) are presented successively. After each learning stage, participants are required to complete a re identification test (new old judgment).(3) EEG equipment: In this study, a 64 channel EGI (GES400) EEG recording system and saline electrode caps were used to continuously record EEG. The electrode positions were determined using the International 10-10 Extended Electrode Position System. The online reference electrode is located at CPz, and the grounding electrode is located at AFz. Use the outer electrodes of both eyes to record horizontal electrooculography (HEOG), and the upper and lower electrodes of the left eye to record vertical electrooculography (VEOG). Adopting full frequency DC sampling, with a sampling frequency of 1000 Hz and a sampling bandwidth of 0-400Hz. Before the EEG starts recording, the impedance between the scalp and electrodes drops below 50 k Ω.