309 research outputs found
Simultaneous Inference of a Partially Linear Model in Time Series
We introduce a new methodology to conduct simultaneous inference of the
nonparametric component in partially linear time series regression models where
the nonparametric part is a multivariate unknown function. In particular, we
construct a simultaneous confidence region (SCR) for the multivariate function
by extending the high-dimensional Gaussian approximation to dependent processes
with continuous index sets. Our results allow for a more general dependence
structure compared to previous works and are widely applicable to a variety of
linear and nonlinear autoregressive processes. We demonstrate the validity of
our proposed methodology by examining the finite-sample performance in the
simulation study. Finally, an application in time series, the forward premium
regression, is presented, where we construct the SCR for the foreign exchange
risk premium from the exchange rate and macroeconomic data.Comment: 61 pages, 6 figure
Automaticity in processing spatial-numerical associations: Evidence from a perceptual orientation judgment task of Arabic digits in frames.
Human adults are faster to respond to small/large numerals with their left/right hand when they judge the parity of numerals, which is known as the SNARC (spatial-numerical association of response codes) effect. It has been proposed that the size of the SNARC effect depends on response latencies. The current study introduced a perceptual orientation task, where participants were asked to judge the orientation of a digit or a frame surrounding the digit. The present study first confirmed the SNARC effect with native Chinese speakers (Experiment 1) using a parity task, and then examined whether the emergence and size of the SNARC effect depended on the response latencies (Experiments 2, 3, and 4) using a perceptual orientation judgment task. Our results suggested that (a) the automatic processing of response-related numerical-spatial information occurred with Chinese-speaking participants in the parity task; (b) the SNARC effect was also found when the task did not require semantic access; and (c) the size of the effect depended on the processing speed of the task-relevant dimension. Finally, we proposed an underlying mechanism to explain the SNARC effect in the perceptual orientation judgment task
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