This study compares native English teachers (NETs) and non-native English teachers (NNETs) in their perceptions of errors as well as their actual feedback. Studies comparing NETs and NNETs have focused on actual feedback practice (Green & Hecht, 1985; T. Kobayashi, 1992), with very few studies relating this feedback to their actual perceptions of error correction (Hyland & Anan, 2006; Kim, 2007). In order to better understand this phenomenon, 26 NETs and 24 NNETs completed a questionnaire and provided feedback on a sample academic essay. The results reveal that while both groups showed differing degrees of perceptions, they did not significantly differ from each other in actual feedback, except that NETs preferred coded feedback than NNETs by explaining errors. This study implies that NNETs are as reliable as NETs in correcting errors, but that they differ in how they give feedback.

It was previously pointed out that mutation is the ultimate source of variation. Adequate variation is needed for plant breeding if there is a limitation in natural genetic resources. When the ionizing radiation has been known to cause chromosomal and genomic alternations, it is widely used for inducing mutagenesis. The electron beam as an ionizing radiation is the principal physical mutagens that induces mutation and effectively used in plant breeding. Since dose-response relationships of electron beam in plant species are rarely known, we investigated the seed germination rate and early seedling growth of irradiated seeds of creeping bentgrass (Agrostis palustris Huds., cv Penn-A1) with various electron beam irradiating conditions (1, 1.3, 2 MeV at both 0.03 mA and 0.06 mA with dose of 100 Gy (Gray) and 0.03, 1, 1.3, 2 MeV at 0.03 mA with dose of 200 Gy, respectively) using electron accelerator at Korea Atomic Energy Research Institute. The growth parameters in terms of shoot length, primary root length, and secondary root length showed similar response between 0.06 / 1 (mA / MeV) at 100 Gy and 0.03 / 0.3 (mA / MeV) at 200 Gy. Bentgrass seed germination was mainly affected by the intensity of irradiated dose (Gray). Germination rate was lowered as the irradiated dose increased. On the other hand, early seedling growth was mainly governed not by the dose of radiation but by voltage.