removed paper6 ("Can Social Comparison Alter the Impact of Socio-Cognitive Conflict on Academic Performance?") due to ethical concerns
corrected previously existing incorrect page number error that was listed on the table of contents for paper7
updated PreFace.pdf to include the new table of contents with paper6 removed
corrected copyright date listed on index file from 2021 to 2022 to match what is in the PDFs due to the 2022 publication date

