Background:To reduce adolescents’social anxiety,the study integrates external factors(social media usage)with internal factors(imaginary audience and appearance-based self-esteem)to internal mechanisms of adolescents...Background:To reduce adolescents’social anxiety,the study integrates external factors(social media usage)with internal factors(imaginary audience and appearance-based self-esteem)to internal mechanisms of adolescents’social anxiety in the Internet age based on objective self-awareness theory and self-esteem importance weighting model.Methods:Utilizing the Social Media Usage Intensity Scale,Social Anxiety Scale,imaginary Audience Scale,and Physical Self Questionnaire,we surveyed 400 junior high school students from three schools in Hubei province,China.Results:A significantly positive correlation is revealed between the intensity of social media usage and both social anxiety and imaginary audience(p<0.001).Conversely,social media usage intensity and appearance self-esteem are significantly negatively correlated(p<0.001).Additionally,the perception of an imaginary audience was negatively correlated with appearance self-esteem(p<0.001).Furthermore,we found that imaginary audience(indirect effect of 0.14,95%CI=[0.02,0.07])and appearance self-esteem(indirect effect of 0.14,95%CI=[0.02,0.07])can respectively act as independent mediators between social networking site use intensity and social anxiety,Additionally,the relationship between imaginary audience and appearance self-esteem can also be chain-mediated(indirect effect of 0.03,95%CI=[0.00,0.02])separately affect the relationship between the two.Conclusion:The imaginary audience serves as an independent mediator that links social media usage intensity to social anxiety among adolescents.Additionally,the observed chain mediation effect involving both the imaginary audience and appearance self-esteem provides novel insights for developing strategies aimed at addressing adolescent social anxiety.展开更多
课堂是教学的主阵地。优秀的教学设计能为教师提供经验与启示,帮助教师提高教学质量。为此,2024年,本刊开设专栏《典型课例》。在该栏目中,我们以“教学设计+点评”的形式,呈现一线教师学习、理解新课标,深化素养导向的课堂教学改革和...课堂是教学的主阵地。优秀的教学设计能为教师提供经验与启示,帮助教师提高教学质量。为此,2024年,本刊开设专栏《典型课例》。在该栏目中,我们以“教学设计+点评”的形式,呈现一线教师学习、理解新课标,深化素养导向的课堂教学改革和育人方式转变的实践与思考。本期典型课例是2023年江苏省高中英语优质课比赛一等奖课例——译林版普通高中英语选择性必修第二册Unit 4 Grammar and usage板块的教学,希望通过课例展示,引领教师关注三维动态语法观,提升英语教学质量。展开更多
为分析非洲菊叶绿体基因组密码子使用模式,本研究从其叶绿体基因组中去除重复CDS(coding DNA sequence)和序列长度小于300 bp后得到53条基因序列,利用Codon W和在线程序CUSP分析其密码子偏好性。结果显示,非洲菊叶绿体基因组密码子第3位...为分析非洲菊叶绿体基因组密码子使用模式,本研究从其叶绿体基因组中去除重复CDS(coding DNA sequence)和序列长度小于300 bp后得到53条基因序列,利用Codon W和在线程序CUSP分析其密码子偏好性。结果显示,非洲菊叶绿体基因组密码子第3位的GC含量为27.94%,偏向于以碱基A和U结尾;ENC范围为36.02~57.43,平均值为47.66,ENC值>45的基因有40条,密码子的偏性较弱;RSCU值>1.00的密码子有29个。中性绘图、ENC-plot及PR2-plot分析结果显示,自然选择是非洲菊叶绿体基因组密码子使用偏性的主要影响因素。最优密码子为UUG、CUU、AAU、AGA、GGA、UAU、CAU。本研究结果为非洲菊重要经济性状的遗传改良、叶绿体遗传和进化分析提供必要的基础数据。展开更多
基金supported by the Ministry of Education of Humanities and Social Science project(2022YJA190006)Research Program Funds of the Collaborative Innovation Center of Assessment toward Basic Education Quality at Beijing Normal University(2023-04-010-BZPKO1).
文摘Background:To reduce adolescents’social anxiety,the study integrates external factors(social media usage)with internal factors(imaginary audience and appearance-based self-esteem)to internal mechanisms of adolescents’social anxiety in the Internet age based on objective self-awareness theory and self-esteem importance weighting model.Methods:Utilizing the Social Media Usage Intensity Scale,Social Anxiety Scale,imaginary Audience Scale,and Physical Self Questionnaire,we surveyed 400 junior high school students from three schools in Hubei province,China.Results:A significantly positive correlation is revealed between the intensity of social media usage and both social anxiety and imaginary audience(p<0.001).Conversely,social media usage intensity and appearance self-esteem are significantly negatively correlated(p<0.001).Additionally,the perception of an imaginary audience was negatively correlated with appearance self-esteem(p<0.001).Furthermore,we found that imaginary audience(indirect effect of 0.14,95%CI=[0.02,0.07])and appearance self-esteem(indirect effect of 0.14,95%CI=[0.02,0.07])can respectively act as independent mediators between social networking site use intensity and social anxiety,Additionally,the relationship between imaginary audience and appearance self-esteem can also be chain-mediated(indirect effect of 0.03,95%CI=[0.00,0.02])separately affect the relationship between the two.Conclusion:The imaginary audience serves as an independent mediator that links social media usage intensity to social anxiety among adolescents.Additionally,the observed chain mediation effect involving both the imaginary audience and appearance self-esteem provides novel insights for developing strategies aimed at addressing adolescent social anxiety.
文摘课堂是教学的主阵地。优秀的教学设计能为教师提供经验与启示,帮助教师提高教学质量。为此,2024年,本刊开设专栏《典型课例》。在该栏目中,我们以“教学设计+点评”的形式,呈现一线教师学习、理解新课标,深化素养导向的课堂教学改革和育人方式转变的实践与思考。本期典型课例是2023年江苏省高中英语优质课比赛一等奖课例——译林版普通高中英语选择性必修第二册Unit 4 Grammar and usage板块的教学,希望通过课例展示,引领教师关注三维动态语法观,提升英语教学质量。
文摘为分析非洲菊叶绿体基因组密码子使用模式,本研究从其叶绿体基因组中去除重复CDS(coding DNA sequence)和序列长度小于300 bp后得到53条基因序列,利用Codon W和在线程序CUSP分析其密码子偏好性。结果显示,非洲菊叶绿体基因组密码子第3位的GC含量为27.94%,偏向于以碱基A和U结尾;ENC范围为36.02~57.43,平均值为47.66,ENC值>45的基因有40条,密码子的偏性较弱;RSCU值>1.00的密码子有29个。中性绘图、ENC-plot及PR2-plot分析结果显示,自然选择是非洲菊叶绿体基因组密码子使用偏性的主要影响因素。最优密码子为UUG、CUU、AAU、AGA、GGA、UAU、CAU。本研究结果为非洲菊重要经济性状的遗传改良、叶绿体遗传和进化分析提供必要的基础数据。
