There are 2 studies that match your criteria.
Criteria: Freq Range=300 kHz - 300 GHz (RF/mmW/THz),Study Type=Human / Provocation,Study Subtype=Cognitive Function & Memory,Status=Completed Without Publication

Details - Project ID 765
Lab	Queen's Univeristy of Belfast
Study Design	900 MHz (GSM) exposure to human volunteers and analysis of cognitive function
Summary	No effects using a standardized computer based test
Citation
Details - Project ID 1082
Lab	Ministry of Health & Welfare, The Netherlands
Study Design	900, 1800 MHz (GSM), 2100 MHz (W-CDMA) exposure to human subjects and analysis of subjective complaints and cognitive function
Summary	Increased complaints with 2100 MHz (W-CDMA), increased reaction time (decreased performance) with 900 MHz (GSM) and 2100 MHz (W-CDMA) exposure, decreased memory function with 1800 MHz(GSM) and 2100 MHz (W-CDMA)
Citation	Zwamborn, et al. TNO Report (FEL-03-C148), (2003) :-