8 research outputs found

    The effect of caffeine ingestion on perception of muscle pain during a sustained submaximal isometric contraction of the quadriceps

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    Background: The purpose of this study was to determine the effects of an acute dose of 5 mg/kg of caffeine on perceived pain of the quadriceps during a sustained submaximal isometric contraction. Methods: A total of 15 low caffeine consuming college aged women (20.5 ± 1.4 y, 66.0 ± 9.0 kg; mean ± SD) participated in this study. 2–7 d after a familiarization trial subjects ingested, in a double blind random crossover manner, either 5 mg/kg caffeine (Caf) or a placebo (P), 1 h prior to performing a 2 min isometric leg extension at 45% of peak torque using visual cues to maintain force production. Every 15 s subjects rated their level of pain using the Borg CR10 pain scale. Subjects returned to the lab 2–7 d later to repeat the testing with the other condition. Data were analyzed using a repeated measures ANOVA with a Tukey\u27s HSD post hoc. Results: Caffeine ingestion resulted in a lower pain score at all time points during the 2 min isometric contraction. This difference approached significance at 90 s (Caf = 3.2 ± 1.4, P = 4.1 ± 1.4; p \u3c 0.10), and became significantly different at 105 s (Caf = 3.8 ± 1.2, P = 4.9 ± 1.5; p \u3c 0.05) and at 120 s (Caf = 4.4 ± 1.5, P = 5.4 ± 1.5; p \u3c 0.05). Conclusion: Acute caffeine ingestion attenuates perception of muscle pain in the quadriceps during a sustained submaximal isometric contraction. This effect become

    Ordinary memory processes in the design of referring expressions

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    How do speakers produce referential descriptions that satisfy addressees’ informational needs during real-time conversation? A recent proposal is that ordinary memory processes can serve as a proxy for the consideration of common ground. But this is only possible if speakers encode and access sufficiently detailed memory representations. We tested this proposal by having speakers describe referents in contexts varying in perceptual similarity to previous contexts in the dialogue. Based on the analysis of a total of 4,817 descriptions from 112 speakers over three experiments, we found little evidence that contextual similarity modulated the informational content of speakers’ descriptions, regardless of whether that similarity was based on configurational cues (Exps. 1 and 2), or on the perceptual experience of interacting with a conversational partner (Exp. 3). In contrast, speakers did modulate their descriptions when their beliefs about the addressee changed, even when the perceptual match between encoding and retrieval contexts was identical. This suggests that the episodic representations accessed during message generation may be too impoverished to serve as an effective proxy for common ground

    Ordinary memory processes in the design of referring expressions

    No full text
    How do speakers produce referential descriptions that satisfy addressees’ informational needs during real-time conversation? A recent proposal is that ordinary memory processes can serve as a proxy for the consideration of common ground. But this is only possible if speakers encode and access sufficiently detailed memory representations. We tested this proposal by having speakers describe referents in contexts varying in perceptual similarity to previous contexts in the dialogue. Based on the analysis of a total of 4,817 descriptions from 112 speakers over three experiments, we found little evidence that contextual similarity modulated the informational content of speakers’ descriptions, regardless of whether that similarity was based on configurational cues (Exps. 1 and 2), or on the perceptual experience of interacting with a conversational partner (Exp. 3). In contrast, speakers did modulate their descriptions when their beliefs about the addressee changed, even when the perceptual match between encoding and retrieval contexts was identical. This suggests that the episodic representations accessed during message generation may be too impoverished to serve as an effective proxy for common ground

    Retrieval Fluency in Audience Design - Experiment 2

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    This project is a direct follow up to our previous work on audience design (see O'Shea, Ralston and Barr: https://osf.io/4akir/ for more details
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