building on previous studies on the effectiveness of different types of written corrective feedback, the present study aimed at investigating whether direct focused corrective feedback and direct unfocused corrective feedback produced any differential effects on the accurate use of english articles by efl learners across two different proficiency levels (low and high). in current study, the par...

with the increasing population and the need for more food, as well as with the development of science and technology, human approach to unnatural and often chemical inputs to increase agricultural production has been a great expansion and problems such as increased cancers, chronic diseases has created environmental pollution. implementation of organic organic is a solution to these problems . ...

  Background : Opioids are one of the most prevalent hygienic difficulties of the country and are causes of prevalence of some dangerous diseases such as AIDS and Hepatitis. Studies show relatively more prevalence of substance use in 15-35 years old students in the country. The purpose of the present study is investigation prevalence of substance use and the interrelated factors involved with t...

having conducted the experiment and analysed the data, the researcher computed the groups mean scores and variances for the test relating to the research question. as the final atep, a t-test was conodonted for the hypothesis. as noted earlier, the significance level was determined at .05 and .01 respectively. the observed t-value was higher than the critical t-value at. 5 and .01 levels. conse...

Background and Aim: This study was conducted in the first 6 months of the year 2005, to define the prevalence of alcohol, psychostimulant, and psychedelic drug abuse in teenagers and adults ranging 15 to 35 years old living in Tehran. Materials and Methods: This is a cross-sectional analysis and the study population encompassed persons aged 15 to 35 years living in Tehran. The study was perfor...