Debate remains about whether the same attentional mechanism subserves subitizing (with number of items less than or equal to 4) and numerosity estimation (with number of items equal to or larger than 5), and evidence is scarce from the tactile modality. Here, we examined tactile numerosity perception. Using tactile Braille displays, participants completed the following three main tasks: (1) Unisensory task with focused attention: Participants reported the number (1~12) of the tactile pins. (2) Unisensory task with divided attention: Participants compared the numbers of pins across the upper and lower area of their left index fingers, in addition to reporting the number of tactile pins on their right index fingers. (3) Cross-modal task with divided attention: Participants reported the number of tactile pins and compared the numbers of visual dots across the upper and lower part of a (illusory) rectangle that overlaid the tactile stimuli. We found that performance of subitizing rather than estimation was interfered with in dual tasks, regardless of whether distractor events were from the same modality (tactile modality) or from a different modality (visual modality). Moreover, a further test of visual/tactile working memory capacity revealed that the precision of tactile subitizing, in the presence of a visual distractor, was correlated with the capacity of visual working memory, not of tactile working memory. Overall, our study revealed that tactile numerosity perception is accounted for by amodal attentional modulation yet by differential attentional mechanisms in terms of subitizing and estimation. 相似文献
While Chinese adolescents become more sexually active, their sexual attitudes are profoundly influenced by traditional gender and sexual norms. The tensions between the rapid transition in youth sexuality and lags in sex education call for a paradigm shift of sexuality education in China. The present study examined the effectiveness of a school-based empowerment comprehensive sexuality education (CSE) intervention in changing adolescents’ sexual knowledge, gender and sexual attitudes, and sexual self-efficacy. We used data from a quasi-experimental intervention study with self-administered pretest and posttest surveys conducted among 1131 10th grade high school students in Lanzhou, northwest China. Whereas 583 participants in two intervention schools attended 12 45-min CSE sessions focusing on gender, rights, and critical thinking skills across 4–7 months, 548 participants in two comparison schools received no or limited conventional sex education. After controlling for differences in sociodemographics and in the influence of family, peers, and internet use between the two groups, female and male adolescents exhibited significantly more accurate sexual knowledge, stronger endorsement of nontraditional gender roles, and greater rejection of sexual double standards immediately after the intervention. Additionally, young women reported significantly higher sexual self-efficacy following the intervention. The findings suggest that the school-based empowerment CSE intervention is helpful in creating an environment in which both young men and young women benefit in sexual knowledge and gender awareness and young women increase their sexual decision-making skills, thereby lending support to the theory and practice of an empowerment CSE approach.
