본 연구에서는 녹시율(綠視率, Index of Greenness)의 정서증진효과에 대한 회복환경 모델(이승훈, 2007a)을 “집" 혹은 “집 이외의 장소"라는 맥락에 따라 검증해 보고자 하였다. 대학생 참여자들(301명)은 하루 동안 12회에 걸쳐 휴대전화 문자메시지를 전송 받았다. 문자메시지를 받자마자 참여자들은 “지금 이 순간"을 기준으로 자신이 있는 곳의 사진을 한 장 촬영하였고, 자신이 있는 곳이 “집"인지 혹은 “집 이외의 장소"인지를 표시하였으며, 이어서 스트레스 척도, 회복환경지각척도, 정적 정서 및 부적 정서 척도를 평정하였다. 일련의 데이터 처리 과정을 거쳐, 표본 1(n = 233; 집 혹은 집 이외의 장소에서 식물의 잎을 본 경우의 데이터들을 모두 포함시킨 표본), 표본 2(n = 54; 집에서 식물의 잎을 본 경우의 데이터들만 포함시킨 표본), 표본 3(n = 219; 집 이외의 장소에서 식물의 잎을 본 경우의 데이터들만 포함시킨 표본)을 만들었다. 회복환경 모델을 표본 1, 2, 3을 대상으로 검증하고 비교해 보았다. 경로분석 결과 (1) 적합도 지수는 표본 3에서 가장 높았고, (2) ‘녹시율 → 회복환경' 경로는 표본 3에서만 유의하였으며, (3) ‘회복환경 → 정서' 경로는 세 표본 모두 유의하였다. 위계적 회귀분석을 한 결과 표본 2에서만 스트레스 × 회복환경 상호작용이 유의하게 나타났다. 즉, 정서에 부정적인 영향을 미치는 스트레스의 효과가 회복환경 지각이 높을 때에만 두드러지게 나타났다. 본 연구 결과는 녹시율이 낮음에도 불구하고 집이 심리적 회복의 중요한 세팅 역할을 하고 있으며, 이로 인해 정서를 증진시킴을 보여준다. 이와는 대조적으로, 본 연구는 집 이외의 장소에서는 녹시율이 높을수록 심리적 에너지가 잘 회복되며, 이로 인해 정서가 증진됨을 보여준다.
This study is to test the restorative environment model (Lee, 2007a) of the emotion-improving effects of the Index of Greenness (IG) according to the context of “home" or “places other than home." During a day, cellular phone text messages were sent to South Korean undergraduates (n = 301) twelve times. On receiving each message, participants took a photograph of their surroundings, marked if they were either “at home" or “in places other than home", and then rated stress scale, the Perceived Restorativeness Scale (PRS), and Positive Affect and Negative Affect Schedule (PANAS) with reference to “here and now." Three samples were drawn through a series of data processing. These samples consisted of the data only in case that the participants saw the leaves of plants (1) at home or in places other than home (sample 1; n = 233); (2) at home (sample 2; n = 54); and (3) in places other than home (sample 3; n = 219). The restorative environment model was tested with sample 1, 2, and 3, and then compared. A series of path analyses showed that: (1) the fit indices were better for the data from the sample 3 than the sample 1 and 2; (2) the causal path from ‘IG' to ‘restorative environment' was statistically significant only in sample 3; and (3) the causal paths from ‘restorative environment' to ‘emotion' were statistically significant in all three samples. Hierarchical multiple regressions showed that stress × restorative environment interaction was statistically significant only in sample 2. In other words, the negative effect of stress on emotion was present only at high level of restorative environment. These results indicate that in spite of the low level of IG, home is an important setting for psychological restoration, which enhances emotion. In contrast, these results indicate that in places other than home, higher IG is associated with higher psychological restoration, which enhances emotion.
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