Eye movement data set of Internet fraud, Shandong Normal University, 2022-2025

Behavioral data were collected after the subjects did eye movement experiment. The experiment was divided into four times, Latin square balance was carried out, and behavioral data was also divided into four times.Eye movement experiments were conducted using Eyelink 1000 (SR Research, Ontario, Canada) eye movement recorder with sampling frequency of 1000 Hz and spatial resolution of 0.2 degree Root Mean Square. The screen resolution of the tested machine is 1024 × 768 pixels. The distance between the subjects' eyes and the screen was 60cm. Experiment Builder 2.2.1 was used to program the experimental flow.The experiment adopted a three-factor mixed experimental design: 2 (subjects category: victims of Internet fraud, those who have not been subjected to Internet fraud) ×2 (time pressure: with time pressure, without time pressure) ×2 (cognitive load: with cognitive load, without cognitive load). The independent variables were subject category, time pressure and cognitive load, in which subject category was inter-subject variable, time pressure and cognitive load were intra-subject variables, and dependent variable was eye movement index.The experiment includes two parts: pre-experiment and formal experiment. The purpose of the pre-experiment is to determine the time required to complete the risk decision option, and to calculate the average time and standard deviation to determine the time setpoint of the time limit under the time pressure condition. The formal experiment requires the subjects to complete the risk decision task. Each subject was required to complete four levels: no time pressure with no cognitive load, no time pressure with cognitive load, no time pressure with cognitive load, and time pressure with cognitive load. The four levels were divided into four times, each time with an interval of 1 week. Each level contained 4 tasks (that is, 4 material presentation sequences), and each task consisted of 32 experiments, divided into two blocks, with rest arranged between the tasks and between the blocks.Without time pressure, participants were asked to press a button as quickly as possible to select their preferred option in the risk decision task. Under time pressure, the experimental process was similar to that under no time pressure, except that the picture presentation time of the risk decision task was changed from unlimited time to -1 standard deviation in the average response time of the subjects in the pre-experiment, and the subjects were informed in the instruction that the picture presentation time was limited. Without cognitive load, the subjects were asked to perform only the risk decision making task. Under cognitive load, the subjects were asked to perform dual tasks of risk decision making and cognitive load. The cognitive load task requires the subjects to remember the five numbers appearing on the screen before the decision task starts. After the decision task, the subjects will hear a sound prompt. If the sound frequency is low, the subjects are asked to report the three smallest numbers in memory. If the sound frequency is high, report the maximum 3 numbers. The order of risk decision-making tasks at four levels was balanced in Latin square between subjects.The process of producing eye movement data set: (1) Each subject is familiar with the environment after entering the laboratory, and then performs eye calibration to ensure that the instrument accurately records the subject's eye movement trajectory. Nine-point correction was used in the experiment. (2) The instruction was presented to the subjects: "Here is a decision making task, and the decision scenario is to buy a lottery ticket. The actual results of each lottery purchase are automatically loaded into your virtual account, and the total amount in your account is related to how much you get paid for the task. Two options A and B will appear on the screen, containing the amount of money and the probability of losing during the gambling process, respectively. If you select A, press F. If you select B, press J. There is no right or wrong answer. There is no time limit for choosing. Please answer carefully." (3) After ensuring that the subject understands the instruction, the instrument is calibrated, and only the eye movement track of the right eye is recorded. (4) After calibration, practice. (5) In order to ensure the validity of experimental data, calibration is carried out twice before each experiment, and the maximum allowable deviation of calibration is 0.2°. (6) Start the formal experiment. The main test machine monitors the subject's gaze in real time. In the experiment, a plus sign appeared in the middle of the screen before each stimulus was presented. Subjects were asked to press the keyboard space bar while looking at the plus sign to present the stimulus option, and the next stimulus option was automatically presented after the selection (under time pressure conditions, if the subject did not make a choice at the end of the time limit, the next stimulus option was also automatically presented). The whole experiment lasted about 40 minutes.Key metrics of data collected from eye tracking experiments include reaction time, mean gaze time, total gaze number, mean saccadic distance, mean gaze time, saccadic return, and mean pupil size. SPSS 26 was used for subsequent data analysis, including descriptive statistics of behavioral data and eye movement data, independent sample T-test, and three-factor repeated measure ANOVA. Finally, the correlation between behavioral data and eye movement data was calculated for each group. The significance level α was set to 0.05 for all the above statistical analyses.AI为你提供母语级高精翻译免费体验