Nt1310 Unit 5 Lab

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After the data was collected it was formulated into 4 tables relating to Alpha Amplitude, Alpha Frequency, Beta Amplitude and Beta Frequency, the tables can be found in the appendix section below. The tables contain ID numbers to identify the volunteers as well as columns to show the amplitude (μV)/frequency (Hz) of alpha and beta during the four periods of no music (NM1, NM2, NM3, NM4),CL, CH, RL and RH. The percentage increase for all the different types of music compared to no music was calculated. Each type of music was compared with the individual period of no music prior to it. Calculations are as follows:

inc CL % = ((CL(μV/Hz) – NM1(μV/Hz))/ NM1(μV/Hz))*100

inc CH % = ((CH(μV/Hz) – NM2(μV/Hz))/ NM2(μV/Hz))*100

inc RL % = ((RL(μV/Hz) – NM3(μV/Hz))/ NM3(μV/Hz))*100

inc RH % = ((RH(μV/Hz) – NM4(μV/Hz))/ NM4(μV/Hz))*100 …show more content…
Lastly the mean, standard deviation and confidence interval were calculated for percentage increase of each type of music. As previously mentioned EEG is approximately ±50 μV, therefore data that was above 50μV was removed prior to carrying out the analysis (this includes ID 5, 7 and 9 of all four tables), leaving the results of 14 volunteers. These data were considered to be outliers and were removed to prevent the central tendency from being effected and the results being deemed unreliable. The appropriate statistical analysis was then carried out on the percentage increase columns for alpha amplitude, alpha frequency, beta amplitude and beta frequency of the 14

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