元认知监控活动对认知负荷和多媒体学习的影响

在多媒体学习的不同时段呈现元认知监控提示,考察其对认知负荷和学习成绩的影响.结果表明,有意识的监控活动增加了被试总的认知负荷,对学习的迁移有积极影响.元认知监控活动提高了迁移测试成绩,但对记忆成绩没有显著影响.在内在、外在元认知负荷较低情况下,增加元认知监控活动有更好的学习迁移效果.     

5～7岁自闭症谱系障碍幼儿数感的特点

本研究采用《幼儿数感测评量表》对26名自闭症谱系障碍（autism spectrum disorders,ASD）幼儿、20名智力障碍幼儿及32名正常幼儿进行数感能力测评,并比较三组幼儿的数感特点。结果发现：（1）ASD幼儿的数感整体和各维度水平均显著低于正常幼儿,但与智力障碍幼儿相当;（2）三组幼儿数感各维度水平在5～7岁之间无明显变化;（3）三组幼儿在数量比较、数量估算和大小比较的能力水平均领先于其他维度,而类比推理和大小推理均相对落后。另外,ASD幼儿和智力障碍幼儿的体积比较与大小推理、类比推理的能力较为接近,而正常幼儿的体积比较能力显著优于大小推理和类比推理。研究表明5～7岁ASD幼儿的数感能力整体落后于同龄正常幼儿,且数感各维度的能力发展不均衡、不同步。本研究揭示了5～7岁ASD幼儿数感能力发展的特点及需求,可为制定相应数感干预方案、促进其数学学习提供参考。     

高二理科生物理问题创造性解决的表象特征研究

物理问题创造性解决是一个发散思维和聚合思维交替运行的过程,而表象对问题的创造性解决具有重要作用。本研究通过自编的物理问题对天津市某中学109名高二理科学生进行物理问题创造性解决测验,探讨高中理科学生物理问题创造性解决中的表象特征。验证了表象与物理问题创造性解决中的发散思维具有显著的正相关,与聚合思维无显著相关。对109名高二理科学生K聚类分析发现：物理问题解决过程中,高创造性和中等程度创造性的学生人数较少,而低创造性的学生人数较多;表象丰富性很高和较高的学生较少,表象丰富性较低的学生较多。     

Psychiatric Distress and Suicidal Tendencies in Adult Cancer Survivors: Verifying the Validity of the Brief Symptom Inventory-18 for Identifying Suicidal Ideation in the Hospitalized Population of Mainland China

The Brief Symptom Inventory-18 (BSI-18) is widely used to assess psychiatric distress but has not been verified in the Chinese population. From March to April 2019, 293 hospitalized cancer patients, aged 20–87, completed the cross-sectional survey with demographics questionnaire, BSI-18, and PHQ-9. We analyzed the single suicide-related item of PHQ-9 with the full score clinical outpoint for BSI-18 and PHQ-9 using SPSS 22.0 and R 2.15, including Pearson's χ² test and ROC curve analyses. A Pearson's χ² test was carried out to compare the three different methods with the gold screening criteria. The p-value was correspondingly to .006, .066, .838. When the PHQ-9?≥?10 criteria for the BSI-18, receiver operating characteristic analysis revealed that AUC values were 0.839, optimal cut-off points for both BSI-18?≥?50, the sensitivity of 85.8%, and 62.5%, respectively. The BSI-18 is suitable for a screening tool for psychological distress and could also be used in clinical settings for preliminary screening of hospitalized cancer patients.