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David Lewis (1974, 1994/1999) proposed to reduce the facts about mental representation to facts about sensory evidence, dispositions to act, and rationality. Recently, Robert Williams (2020) and Adam Pautz (2021) have taken up and developed Lewis's project in sophisticated and novel ways. In this paper, we aim to present, clarify, and ultimately object to the core thesis that they all build their own views around. The different sophisticated developments and defenses notwithstanding, we think the core thesis is vulnerable. We pose a dilemma by considering the two sides of a current epistemological controversy over the relation between evidence and rational belief: permissivism vs. uniqueness. As we argue, the prospects for the Lewisian project look dim when either supposition is clearly made. 相似文献
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This article describes a 2-year exploratory research study of alphabet knowledge instruction in 13 kindergarten classrooms in four at-risk urban schools. Based on insights for teaching from five evidence-based advantages that influence acquisition of letter names and sounds, instruction of letter names and sounds was enhanced to increase students’ exposure to and practice with letters and to provide greater instructional focus on difficult-to-learn letters through brief lessons taught through distributed cycles of review. Results of this study show that students experienced increased success in acquiring alphabet knowledge, through Enhanced Alphabet Knowledge instruction. 相似文献
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Trevor M. Shackleton John M. Bowsher Ray Meddis 《The Quarterly Journal of Experimental Psychology Section A: Human Experimental Psychology》1991,43(3):503-516
The position and image-width of the simultaneous images produced by very short tone pulses were measured as a function of interaural time difference (ITD) at both low- (250 and 800 Hz) and high- (2500 and 8000 Hz) frequencies using a direct-estimation technique.
Primary images are lateralized towards the ear receiving the leading stimulus. At low frequencies image position is proportional to interaural phase-difference (IPD) below 90° and remains at the lead-ear for larger values. At high frequencies image position is proportional to ITD up to 500-1000 μsec. Secondary images are reported on the opposite side of the head for IPDs greater than 180° at low frequencies, and at ITDs greater than 500 μsec at high frequencies. Image width is approximately constant for all ITDs and both images at a given frequency, but becomes more compact as frequency increases.
The data are discussed in terms of onset cues and stimulus fine-structure cues. The best explanation is in terms of an onset mechanism, but one that is calibrated in terms of IPD at low frequencies. The existence of double images is explained in terms of a breakdown in the mechanism determining fusion. 相似文献
Primary images are lateralized towards the ear receiving the leading stimulus. At low frequencies image position is proportional to interaural phase-difference (IPD) below 90° and remains at the lead-ear for larger values. At high frequencies image position is proportional to ITD up to 500-1000 μsec. Secondary images are reported on the opposite side of the head for IPDs greater than 180° at low frequencies, and at ITDs greater than 500 μsec at high frequencies. Image width is approximately constant for all ITDs and both images at a given frequency, but becomes more compact as frequency increases.
The data are discussed in terms of onset cues and stimulus fine-structure cues. The best explanation is in terms of an onset mechanism, but one that is calibrated in terms of IPD at low frequencies. The existence of double images is explained in terms of a breakdown in the mechanism determining fusion. 相似文献
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The Psychological Record - The hypothesis was tested that the failure of Bugelski et al (1952) to obtain latent extinction effects in a “replication” of Seward and Levy’s (1949)... 相似文献
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