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Hafen CA Allen JP Mikami AY Gregory A Hamre B Pianta RC 《Journal of youth and adolescence》2012,41(3):245-255
Student engagement is an important contributor to school success, yet high school students routinely describe themselves as
disengaged. Identifying factors that alter (increase) engagement is a key aspect of improving support for student achievement.
This study investigated students’ perceptions of autonomy, teacher connection, and academic competence as predictors of changes
in student engagement within the classroom from the start to the end of a course. Participants were 578 (58% female) diverse
(67.8% White, 25.2% African American, 5.1% Hispanic, 1.2% Asian American) high school students from 34 classrooms who provided
questionnaire data both at the start and the end of a single course. Novel results from a cross-lagged model demonstrated
that students who perceived their classrooms as allowing and encouraging their own autonomy in the first few weeks increased
their engagement throughout the course, rather than the typical decline in engagement that was demonstrated by students in
other classrooms. This finding is unique in that it extended to both students’ perceptions of engagement and observations
of student engagement, suggesting a fairly robust pattern. The pertinence of this finding to adolescent developmental needs
and its relationship to educational practice is discussed. 相似文献
2.
This study investigated the relationship between social information processing (SIP) and both relational and overt, physical
aggression in a longitudinally-followed sample of 228 adolescent girls (ages 11–18; 140 with ADHD and 88 comparison girls).
During childhood, girls participated in naturalistic summer camps where peer rejection, overt physical aggression, and relational
aggression were assessed via multiple informants and methods. Approximately 4.5 years later, these girls participated in follow-up
assessments during which they completed a commonly-used vignette procedure to assess SIP; overt and relational aggression
were again assessed through multiple informants. Correlations between (a) overt and relational aggression and (b) maladaptive
SIP were modest in this female adolescent sample. However, relationships between aggression and SIP were stronger for the
comparison girls than for the girls with ADHD. The relevance of SIP models for adolescent girls and clinical implications
of findings are discussed.
相似文献
Amori Yee MikamiEmail: |
3.
Eiichi Mikami Tsutomu Ohno Hiroshi Matsumoto 《Forensic Science International Supplement Series》2002,130(2-3):140-146
An easily available, simultaneous identification/determination procedure for phentolamine (PHE) and sildenafil (SIL) in adulterated dietary supplements was established by using a combination of three different analytical methods; thin-layer chromatography (TLC), liquid chromatography–mass spectrometry (LC/MS) and a high-performance liquid chromatography (HPLC)/photo-diode-array. The sample solution for TLC was applied to silica gel 60 F254 plates with chloroform/ammonia solution (28)/methanol (70:5:3, lower layer) and chloroform/diethylamine/methanol (15:3:2) as the developing solvent. Spots were located under UV radiation at 254 nm. Mass spectra of PHE and SIL by LC/MS were investigated with electrospray ionization (ESI) interface, under both positive and negative ion mode. The HPLC analysis was performed on a column of Wakosil 5C18 (4.6 mm×150 mm, 5 μm) with water/methanol/acetonitrile/triethylamine (580:250:170:1) adjusted with phosphoric acid to pH 3.0 as the mobile phase, and the effluent was monitored with a photo-diode-array detector. Quantitative HPLC analysis of PHE and SIL were detected at 280 nm. When this procedure was applied to commercial soft drinks, PHE and SIL were identified and determined at a concentration of 17 mg PHE and 44 mg SIL per bottle, respectively. The procedure described here is available for the screening of PHE and SIL in adulterated supplements. 相似文献
4.
T Takatori Y Tsutsubuchi K Terazawa M Nagao H Akabame H Mikami 《Forensic science international》1990,47(3):261-268
The Lewis blood grouping of human saliva stains could be detected by an enzyme-linked immunosorbent assay (ELISA) using anti-Le(a) and anti-Le(b) monoclonal antibodies with an avidin-biotin complex (ABC). The saliva stains (1.0 by 1.0 cm in size) were used as samples and not only could the Lewis substances of 57 individual stains be correctly typed by this method, but also it was clarified that there are several different secretion patterns of amounts of Le(a) and Le(b) substances in 3 individual Lewis types. 相似文献
5.
Koji Kato M.D. Katsunaka Mikami M.D. Ph.D. Keitaro Kimoto M.D. Kousuke Kimoto M.D. Yuki Takahashi M.D. Reiko Sato M.D. Hideo Matsumoto M.D. Ph.D. 《Journal of forensic sciences》2014,59(2):417-419
The aim of this study was to investigate the relationship between the clinical features of suicide attempts and the Great East Japan earthquake in Kanagawa. We enrolled 592 patients who attempted suicide and were hospitalized for inpatient treatment. Clinical features were compared between before the earthquake (A) and after the earthquake (B) groups. The number of suicide attempts increased from 286 to 306. The rate of increase in suicide attempts in men was the highest in the age group of 40–59 years. The frequency of joblessness, family psychiatric histories, precipitating event, and alcohol intake at suicide attempt was significantly higher in the B group than in the A group. The number of patients in serious condition in the B group was significantly higher than that in the A group. Other clinical features related to suicide in people who were indirectly affected by the earthquake disaster should be investigated to develop targeted prevention strategies. 相似文献
6.
Amori Yee Mikami Erik A. Ruzek Christopher A. Hafen Anne Gregory Joseph P. Allen 《Journal of youth and adolescence》2017,46(11):2341-2354
Secondary school is a vulnerable time where stagnation or declines in classroom behavioral engagement occur for many students, and peer relationships take on a heightened significance. We examined the implications of adolescents’ perceptions of relatedness with classroom peers for their academic learning. Participants were 1084 adolescents (53% female) in 65 middle and high school classrooms. Multilevel cross-lagged path analyses found that adolescents’ perceived relatedness with classroom peers subsequently predicted their increased self-reported behavioral engagement in that classroom from fall to winter and again from winter to spring. Higher engagement in spring predicted higher end of year objective achievement test scores after statistical control of prior year test scores. Implications are discussed for increasing classroom peer relatedness to enhance adolescents’ achievement. 相似文献
7.
Simultaneous identification/determination system for phentolamine and sildenafil as adulterants in soft drinks advertising roborant nutrition 总被引:2,自引:0,他引:2
An easily available, simultaneous identification/determination procedure for phentolamine (PHE) and sildenafil (SIL) in adulterated dietary supplements was established by using a combination of three different analytical methods; thin-layer chromatography (TLC), liquid chromatography-mass spectrometry (LC/MS) and a high-performance liquid chromatography (HPLC)/photo-diode-array. The sample solution for TLC was applied to silica gel 60 F(254) plates with chloroform/ammonia solution (28)/methanol (70:5:3, lower layer) and chloroform/diethylamine/methanol (15:3:2) as the developing solvent. Spots were located under UV radiation at 254 nm. Mass spectra of PHE and SIL by LC/MS were investigated with electrospray ionization (ESI) interface, under both positive and negative ion mode. The HPLC analysis was performed on a column of Wakosil 5C18 (4.6 mm x 150 mm, 5 microm) with water/methanol/acetonitrile/triethylamine (580:250:170:1) adjusted with phosphoric acid to pH 3.0 as the mobile phase, and the effluent was monitored with a photo-diode-array detector. Quantitative HPLC analysis of PHE and SIL were detected at 280 nm. When this procedure was applied to commercial soft drinks, PHE and SIL were identified and determined at a concentration of 17 mg PHE and 44 mg SIL per bottle, respectively. The procedure described here is available for the screening of PHE and SIL in adulterated supplements. 相似文献
8.
Masafumi Tomita Iwao Ijiri Kazuaki Shimosato Yoshio Mikami 《Forensic science international》1984,24(1):43-49
The effect of heating on Y-chromosome detection was investigated. Heat-treated blood was divided into four groups according to the hemolysis pattern obtained by the coil planet centrifuge system. A significant difference between the Y-positive nuclei of males and females was observed up to group III of the hemolysis pattern, and it was possible to determine the sex of the blood donor in spite of karyolysis and degeneration of blood components. However, sex determination of blood in group IV, indicating complete hemolysis, was impossible because of overlapping between male and female Y-chromosome counts. Practical application of this sex determination method was successful even with severly burned cadavers. However, it was suggested that putrefaction together with heat damage made the identification nearly impossible. 相似文献
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