DATA COLLECTION PAGE

***DATA COLLECT GRAPHIC** (not available yet) DATA COLLECT DESCRIPTION This program can be used to collect data for later analysis. The data collected is put in a file which contains some header information which describes the sample and then one record for each sample. The data in the file is tab separated so it can be read as text file by any spreadsheet program or other statistical analysis program. Sample rate is set up by the user and can be from 10 per second to one sample every few seconds or minutes (for very long data collection periods). The data can then be analyzed and graphed by a user supplied spreadsheet program or other analysis program. The Data Collection Program will sample from one to eight NeuroLink Units simultaneously. The channels can be preconfigured to any combination of GSR, Temperature or Heart Rate channels. PARAMETERS Length of sample in seconds Number of samples per second Delay before start File Name Comments DESCRIPTION OF THE OUTPUT FILE Descriptive information including Filename, time and date, user comments-- The data part of the file contains one record for each sample containing: Time Stamp Sample Number Channel 1 Velocity Channel 1 Gain Channel 1 Absolute Value Channel 2 Velocity Channel 2 Gain ... ... Channel 4 Absolute Value APPLICATIONS EXAMPLES RESEARCH: show a 20 minute video tape to two people separately; collecting NeuroLink physiological data during both sessions. Evaluate the tapes, identifying places where significant events occur. the time from the beginning of the tape in seconds. Graph the data from the two people and compare heart rate average and instantaneous for both on the same graph. Mark on the graph where the significant event occurred. Evaluate the differences between the two subjects. Compare GSR left and right for each as well. With two NeuroLinks you could collect all the information at once. Another way of comparing two people at the same time is to look at HR/GSR from each person. This would require another set of probes and set up prior to collecting data. DATA ANALYSIS The three easiest programs to use to analyze this data are LOTUS 123, EXCEL or QUATRO PRO spread sheet programs. They all have a built in graphing functions which make it easy to select columns of data for graphing. You can also do some additional calculations to look at other information. For instance, in another column calculate the absolute value of the difference between GSR1 Velocity and GSR2 Velocity. This will give you an indication of symmetry between the two sides of the body. You can then graph this column with the time column as the x-axis.