Experiment Procedure

This experiment consisted of four sessions (see Fig. 7.5). In the first session, when a participant arrived at the experiment room, he/she was informed of the experiment (see Appendix 14) and asked to sign a consent form (see Appendix 2C). Participants provided consent, completed a screening questionnaire containing questions related to medical history, medications, and demographics (Appendix 7A), and performed an RAPM test to control for intelligence. Following the screening procedure, a compatible EEG electrode cap was put on the participant’s head, and then EEG data were recorded at rest state (eyes-closed and eyes-open conditions).

After the baseline EEG recording, the participant was exposed to the animated contents either in 3D mode or 2D mode depending upon the participant’s group. The participant watched and learned information provided in the animated contents and retained the information. Immediately, after the learning task, participant was exposed to the oddball task, which lasted approximately 4 minutes. A 30-minute retention time was given to participants including the duration of oddball task. After the retention time, the participant performed the memory recall task. Then EEG electrode cap was removed and the participant completed a feedback questionnaire containing questions related to learning environment (2D or 3D), participant’s perception, and experiment procedure (Appendix 7B). At the end of this

Experimental design with session wise tasks

Figure 7.5 Experimental design with session wise tasks.

first session, the participant was requested to participate for a second session (after two months) for a memory recall task to determine LTM retention and rehearsal of the contents (2D/3D animation).

In the second session, an EEG electrode cap was put on the participant’s head, and EEG data was recorded at rest state (eyes-closed, eyes- open conditions). Next, the participant performed a memory recall task in which the participant had to recall the 2D or 3D contents learned in the first session. EEG data was recorded during the recall task. After the recall test, the participant watched the same animated contents (learning task) again for rehearsal. At the end of the second session, the participant was reminded to come for the third session after two months for the same retrieval task. The same procedure of session 2 was repeated in the third and fourth sessions. However, in the fourth session, the animated contents (learning task) were not presented again, as it was the last session.

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