The effect of bilateral stimulation in RDI(Resource Development and Installation) is controversy. Hornsveld et.al (2011) concluded that effectiveness of eye movements is questionable in RDI or safe place. However, in EMDR training many trainers teach to use slow and short eye movements for RDI and safe place. We have to investigate the effect of slow eye movements on positive memories.
We applied RDI procedure to healthy thirty graduate students. Each individual were asked to write down three positive memories on achievement, and experienced RDI procedure under three different conditions: rapid eye movements [REM], slow eye movement [SEM] and eye fixed [EF] condition. Speed of eye movements are 1Hz[REM] or 0.2Hz[SEM] and it was displayed 4 back and forth of 6 sets. Duration of EF condition was 24 seconds of 6 times. All procedure was taken with their eyes open. We measured general emotional scale(positive, negative and relaxed feeling), vividness of imagery, emotional intensity, and internal- external attention ratio.
2-factors(pre-post x 3conditions) ANOVA was conducted on imagery vividness, emotional intensity, three different feelings. Imagery vividness, and emotional intensity increase by time, but there was no difference among conditions. On three feelings, no effect and interaction were found.
1- factor(3 conditions) ANOVA on attention ratio indicated main effect of condition, and EF conditions attended significantly more internally than either REM or SEM conditions.
In SEM condition, we divided the participants into two groups based on attention ratio. Internally attending group showed more vivid imagery, more positive feeling and less negative feeling than externally attending group.
When we consider the role of bilateral stimulation, we must consider the importance of attention direction.
Masaya Ichii M.A. is a Professor of Clinical Psychology in department of clinical psychology, Hyogo University of Teacher Education. He accomplished credits for doctoral program in 1994 in psychology department of Waseda University, at Tokyo Japan. He is a Certified Clinical Psychologist since 1991. He is teaching clinical psychology since 1994 at University of the Ryukyus and Hyogo University of Teacher Education. He is an EMDR Institute Facilitator since 1997. He is an EMDRIA Approved Instructor & Consultant since 1998. And, he is an EMDR Institute Trainer since 2006. He is a member of editorial board of Journal of EMDR Practice and Research, a president of Japan EMDR Association, a board member of EMDR, Asia, Japanese Association of Behavior Therapy and Japanese Association of Clinical Psychology.