시스템의 기능이 많아지면서 시스템의 반응시간은 중요한 요소로 인식되고 있다. 반응지연에 대한 기존의 연구들은 대부분 컴퓨터를 사용하는 상황을 바탕으로 이루어졌고 더 단순한 과제를 사용하는 기기를 바탕으로 이루어진 연구는 부족한 실정이다. 이에 본 연구는 휴대전화를 사용하는 상황에서 반응지연이 사용자들의 행동과 감정에 미치는 영향을 알아보고자 하였다(실험 1; 독립변인: 반응지연 정도, 종속변인: 행동적, 정서적 평가). 더 나아가 사용자가 제품을 사용하는 상황(활성화된 모드)에 따라 동일한 반응지연이 있을 경우 행동 및 감정 평가에서 차이가 나타나는지 알아보았다(실험 2; 독립변인: 반응지연 정도, 사용모드, 종속변인: 행동적, 정서적 평가, 스트레스, 정신적 노력). 그 결과, 반응지연이 있으면 과제를 수행하는 시간(효율성)이 길어지고 부정적인 감정이 유발됨을 알 수 있었다. 또한 상황(활성화된 사용 모드)에 따라서 동일한 과제를 수행하는 경우라도 그 평가에서 차이가 나타남을 알 수 있었다. 즉, 뚜렷한 목적을 가지고 과제를 했을 경우 반응지연이 있게 되면 그렇지 않은 경우보다 더 부정적인 감정을 느끼고 이 경우 반응지연의 유무가 큰 영향을 미친다는 결과가 나타났다. 또한 같은 과제를 수행함에 있어서도 정신적인 노력이 더 많이 소모된다고 느끼는 것으로 나타났다. 본 연구는 휴대전화 상황에서 반응지연 정도가 사용자들의 감정뿐 아니라 수행에도 영향을 줌을 확인하였고 동일한 과제의 제시한 경우라도 사용 환경에 따라 제품 평가에 차이를 보임을 실험을 통하여 확인하였다.

This study examined the effects of the fragrance of lemons on increasing concentration and decreasing stress in the in the elderly with geriatric disease in a nursing home. This study was conducted 24times from Jan15. 2004 to July22. 2004 The program was distinguished between the group of control and lemon treatment. The group of control was conducted just horticultural therapy. The group of lemon treatment was run parallel horticultural therapy with the treatment of fragrance of lemons. Blood pressure was measured to distinguish between hypertension and hypotension. The result of hypertension people in the group of control was that systolic blood pressure was 134.3 as average before horticultural therapy and 134 after horticultural therapy. The pressure after horticultural therapy was more -0.3 different than the before. Diastolic blood pressure was 74.3 before and 72.7 after. The pressure after horticultural therapy was more -1.6 different than the before. The result of hypertension people in the group of lemon treatment was that Diastolic blood pressure was 134 as average before lemon treatment and horticultural therapy and 131.3 after lemon treatment and horticultural therapy. The pressure after horticultural therapy was more -2.7 different than before. Minimum blood pressure was 72 before and 72.3 after . The pressure after horticultural therapy was more +0.3 different pressure than the before. The result of hypotension people in the group of control was that systolic blood pressure was 111.3 as average after horticultural therapy. It was not so different between before and after. Diastolic blood pressure was 64.3 after therapy. The pressure was more +1.6 different pressure than the before. In case of pulse rate, the group of control was 79 as average before horticultural therapy and 78.7 after. The pressure was more -0.3 different average than the before. In contrast, the group of lemon treatment was 73.8 before the therapy and treatment of fragrance of lemons and 77.3 after. The pressure was more +3.5 different average than the before. most patients were improved their characters after this program (except C and E) as the result of character test. Therefore, following or this result of study, horticultural program with citrus fragrance of lemons that is helpful to concentration and anti-stress is effective for geriatric diseases especially stability of emotion.