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This research aimed at studying the relationship between the perceived teacher autonomy support, basic psychological needs (autonomy, competence and communication), intrinsic motivation and effort in Structural equation modeling method. 287 freshmen of Babol’s boys high schools were selected through stage cluster sampling method. These subjects answered to the Learning Climate Questionnaire (Black & Deci, 2000), Basic Need Psychological Scale (La Guardia et al. 2000), Intrinsic Motivation Scale (1989) and Effort Scale (Dupeyrat & Marine, 2005).Results of the study revealed that teacher autonomy support exerted a direct and significant influence upon the psychological needs satisfaction, and this would have an indirect influence upon the students’ intrinsic motivation. In addition, autonomy and competence had a positive and direct influence upon the intrinsic motivation, while the effect of communication on the intrinsic motivation was not significant. Intrinsic motivation exerted a direct and significant influence upon students’ effort. In general based on the results of the study it can be concluded that teacher autonomy support can meet the students’ basic psychological needs which can in turn influence their intrinsic motivation

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Employees expect respect from their co-workers and supervisors and guarantee of job security which is appropriate for their efforts in the workplace. Also, those with overcommitment to work need to be more supported. A set of these variables are included in the effort-reward imbalance model. The objectives of this study were to assess validity of the ERI model and its effects on fatigue, emotional exhaustion, physical health and psychosomatic complaints. To test validity of ERI model, a sample of 235 personnel of an industrial company in Isfahan, Iran, was selected. To measure predictor variables, ERI questionnaire (Zurlo, Pes & Siegrist, 2010) was used. To measure criterion variables Including fatigue, emotional exhaustion, physical health and psychosomatic complaints, fatigue scale (Chalder & et al,1993),emotional exhaustion scale(Malach,1998),Physical health scale (Hilderbrandt & et al, 1991) and psychosomatic complaints scale(Driken,1969) were used respectively.  Factor analysis of ERI scale elicit four subscale namely job security, respect, effort and overcommitment with favorable stability. The results showed that there was a positive relation between two subscales of respect and job security and criterion variables. There was also a negative relation between two subscales of effort and overcommitment and criterion variables. The results of this study can be of prime importance for the improvement of personnel’s health in the industrial environments.