# Experiment 4: 2022/23 Replication of Field-Dependency and Cybersickness
# Study run by J. Josupeit, L. Greim, and S. Sanchez Rivas

"VR_RFT_Limesurvey" contains 4 data files, 1 R-script, 2 supplementary files, and 1 Readme text file:

# "VR_RFT_Codebook.xlsx" contains more detailed information on the variables in the LimeSurvey data
   The following variables are not further explained in the codebook, as they are only placeholders for text blocks in the questionnaire (e.g. to explain the next step of the experiment): Begruessung, Datenschutz, FrACTText & Stereo, InstruktionfuerVP, demographfertig, Frageboegen, Trackpad, VRVorbereitung, SSQpraeStartCity1, MISCStartCity1, City1Anweisung, City2Anweisung, SSQpostStartCity1, SSQpostStartCity2, pause, SSQpraeStartRFT, pause2, RFTAnweisung, SSQpostStartRFT, SSQpraeStartCity2, MISCStartCity2, SSQpostStartCity2, postexposition 

# "VR_RFT_Data_Filtered.csv" contains the filtered demographic data from the LimeSurvey questionnaire

# "VR_RFT_Data_Unfiltered.csv" contains the unfiltered LimeSurvey data

# "VR_RFT_Preprocessing_Limesurvey.R" contains the preprocessing steps and numerical encoding of the filtered LimeSurvey data in R

# "VR_RFT_Survey.lss" contains the LimeSurvey lss-file to access the questionnaire via the LimeSurvey app
   Since LimeSurvey is still proprietary software, if you have problems to open the lss-file, access the survey with the following link:
   https://bildungsportal.sachsen.de/umfragen/limesurvey/index.php/932556?newtest=Y&lang=de

# "VR_RFT_Survey_Experimental_Protocol.csv" contains the demographic data from the survey combined with the experimental protocol

# "VR_RFT_Survey_final.csv" contains the preprocessed LimeSurvey data
   The delimiter for the data is "," the decimal separator "."
   The first variables are the same as in the unprocessed data, the only differences are:
   City1 and City2 variables are combined in a single "City" variable, so e.g. instead of "SSQprae1City1" and "SSQprae1City2" there is "SSQprae1City".

   Important note: In the LimeSurvey data, participant 1 entered an erronous age, which cannot be included when calculating the overall age-distribution. 

   After preprocessing the answers are coded as follows:
      # general answers: "Ja" (yes) = 1, "Nein" (no) = 0 
      # Geschlecht/Gender: "männlich" (male) = 0, "weiblich" (female) = 1
      # VorerfahrungVRBed/Previous Experience with VR: "weniger als 30 Minuten" (< 30 min) = 1, "30 Minuten bis 5 Stunden" (30 min to 5h) = 2, "mehr als 5 Stunden" (> 5h) = 3
      # MISC questions, recoded to the number at the start of the German answers, e.g. "0 - keine Probleme" (German translation of "no problems") = 0
      # SSQ questions: "gar nicht" (German translation of "not at all") = 0, "etwas" (German translation of "slightly") = 1, "mittel" (German translation of "moderately") = 2, "stark" (German translation of "very") = 3

source for SSQ: Kennedy, R. S., Lane, N. E., Berbaum, K. S., & Lilienthal, M. G. (1993). Simulator Sickness Questionnaire: An Enhanced Method for Quantifying Simulator Sickness. The International Journal of Aviation Psychology, 3(3), 203–220. 
source for MISC: Bos, J., Mackinnon, S., & Patterson, A. (2006). Motion Sickness Symptoms in a Ship Motion Simulator: Effects of inside, Outside and No View. Aviation, space, and environmental medicine, 76, 1111-1118.



