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本研究では,ストレスークリーナー(SC-SX:株式会社テクノスジャパン製)の心理・身体的リラクセーション効果を検証した.対象者は44名(男性20名,女性24名,平均年齢34.14歳,SD=11.58歳)であった.対象者は,SC-SXの音楽付映像AおよびBを順に視聴した.心理指標の測定には,対象者の気分状態が用いられた.気分状態の測定には,Profile of Mood State短縮版(POMS:横山,2005)を用い,映像視聴前(T1)・A視聴後(T2)・B視聴後(T3)の3時点で回答するよう教示された.POMSは,緊張-不安(Tension-Anxiety:T-A),抑うつ-落ち込み(Depression-Dejection:D),怒り-敵意(Anger-Hostility:A-H),活気(Vigor:V),疲労(Fatigue:F),混乱(Confusion:C)の6つの下位尺度から構成され,総合的な気分状態(Total Mood Disturbance:TMD)は,Vを除く全ての下位尺度を合計した点数からV得点を減じて算出された.生理指標の測定には生体信号(筋電位)が用いられた.生体信号は,周波数解析(FFT)を行われた後,2Hz〜40Hzのパワー値が3時点について記録された.記録された生体信号は,全て積算され,平均を求めたものがPCの画面上へ100指数で表された(以下,NB値:Numerical of biological signal).統計解析には,映像視聴時期を独立変数,POMSの各下位尺度得点平均値・総合得点(TMD)平均値・NB値平均値を従属変数とする1要因3水準の反復測定分散分析を用いられた.全ての下位尺度,TMD,NB値において,映像視聴時期の主効果が確認されたT-A,A-H,F,C,TMD:p<.001,V:p<.01,D:p<.05,NB:p<.10).単純主効果(Bonferoni法)の検討を行った結果,T1-T2において,全ての下位尺度およびTMDの有意な低減が確認された(ps<.05).T1-T3においては,D以外の全ての下位尺度およびTMDの有意な低減が確認された(ps<.01),また,T2-T3においては,T-AおよびNB値に有意な低減が認められた(緊張-不安:p<.01,NB:p<.10).以上の結果から,SC-SXの心理・身体的リラクセーション効果が確認された.
This study investigated the psychological and physiological relaxation effects of the STRESS-CLEANER (SC-SX: Technos Japan Co., Ltd.). The participants were 44 healthy adults (20 men and 24 women, mean age: 34.14±11.58) who watched two music videos using the SC-SX. The Profile of Mood States-Brief Japanese Version (POMS: Yokoyama, 2005) was used to measure psychological variables and measurements were made at 3 time periods: baseline (T1), after watching video A (T2), after watching video B (T3). POMS consists of six subscales: Tension-Anxiety (T-A), Depression (D), Anger-Hostility (A-H), Vigor (V), Fatigue (F), and Confusion (C). Total Mood Disturbance (TMD) was calculated by subtracting V from the total for the other subscale scores. The biological signals (Electromyography: EMG) was used to measure physiological variables of the participants. Signals were analyzed by Fast Fourier Transformation (FFT). The power level of the Muscle potential was recorded between 2Hz and 40Hz during the three time periods. After the recording, the biological signals were integrated and the mean value was displayed on a PC screen as the Numerical of biological signals (NB). To investigate changes of POMS and NB, one-way ANOVAs with a repeated-measures design were conducted. Results indicated the significant main effect of the time period (T-A, A-H, F, C, TMD: p<.001, V: p<.01, D: p<.05, NB: p<.10). Post hoc analysis of group differences using Bonferroni's test indicated the following: (1) between T1-2, TMD of POMS and all subscales decreased significantly (ps<.05), 2) between T1-3, TMD of POMS and all subscales other than Depression decreased significantly (ps<.01), 3) between T2-3, only Tension-Anxiety and NB decreased significantly (Tension-Anxiety: p<.01, NB: p<.10). These findings suggested the C-SX had the effects of promoting the relaxation response.
