TY - JOUR
T1 - Should it matter when we record? Time of year and time of day as factors influencing frontal EEG asymmetry
AU - Velo, Jamie R.
AU - Stewart, Jennifer L.
AU - Hasler, Brant P.
AU - Towers, David N.
AU - Allen, John J.B.
N1 - Funding Information:
The authors wish to thank Dara Halpern, Eliza Ferguson, Craig Santerre, Eynav Elgavish Accortt, Andrew Bismark, Jay Hegde, and myriad research assistants for their efforts in recruiting and testing participants, and to thank Jim Coan for his invaluable contributions leading to the receipt of NIMH R01-MH066902 , which funded portions of the collection of these data. This work was also funded, in part, by a grant from the NARSAD foundation .
PY - 2012/10
Y1 - 2012/10
N2 - Resting frontal encephalographic (EEG) asymmetry, often conceptualized as a trait marker for depression, is influenced by occasion-specific factors, including time of year and the time of day of the recording session as demonstrated recently (Peterson and Harmon-Jones, 2009). The current study examined the influence of seasonal and chronological variables on resting frontal asymmetry, and also assessed whether different reference montages or surface transformations were equally susceptible to these influences. In a direct replication attempt, contrary to previous findings, no simple time of year by time of day interaction was found. Time awake at recording, however, was an important moderating variable of the relationship between photoperiod and time of day. EEG asymmetry scores based on current-source density (CSD) transformed data, however, appeared less vulnerable to these influences, providing further evidence to suggest that the CSD transform may be advantageous for examining stable trait estimates of frontal EEG asymmetry.
AB - Resting frontal encephalographic (EEG) asymmetry, often conceptualized as a trait marker for depression, is influenced by occasion-specific factors, including time of year and the time of day of the recording session as demonstrated recently (Peterson and Harmon-Jones, 2009). The current study examined the influence of seasonal and chronological variables on resting frontal asymmetry, and also assessed whether different reference montages or surface transformations were equally susceptible to these influences. In a direct replication attempt, contrary to previous findings, no simple time of year by time of day interaction was found. Time awake at recording, however, was an important moderating variable of the relationship between photoperiod and time of day. EEG asymmetry scores based on current-source density (CSD) transformed data, however, appeared less vulnerable to these influences, providing further evidence to suggest that the CSD transform may be advantageous for examining stable trait estimates of frontal EEG asymmetry.
KW - EEG asymmetry
KW - Photoperiod
KW - Seasonal
KW - Trait
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U2 - 10.1016/j.biopsycho.2012.06.010
DO - 10.1016/j.biopsycho.2012.06.010
M3 - Article
C2 - 22867950
AN - SCOPUS:84865407117
VL - 91
SP - 283
EP - 291
JO - Biological Psychology
JF - Biological Psychology
SN - 0019-493X
IS - 2
ER -