Table 4.

Sustained Activation as a Function of Age Group, Search Condition, and Region of Interest

	Younger		Older
	Constant	Varied	Constant	Varied
Left MFG	0.078 (0.606)	0.103 (0.432)	0.143 (0.720)	−0.013 (0.508)
Right MFG	−0.029 (0.364)	0.024 (0.488)	0.010 (0.341)	0.039 (0.456)
Left FEF	0.019 (0.287)	−0.027 (0.284)	0.091 (0.527)	0.036 (0.279)
Right FEF	−0.069 (0.244)	−0.095 (0.304)	0.082 (0.321)	0.042 (0.309)
Left SPL	−0.160 (0.767)	−0.089 (0.466)	0.004 (0.513)	0.111 (0.492)
Right SPL	−0.136 (0.790)	−0.002 (0.477)	0.077 (0.701)	0.234 (0.763)
Left IPS	−0.192 (0.630)	−0.152 (0.314)	−0.082 (0.509)	0.028 (0.513)
Right IPS	−0.137 (0.504)	−0.095 (0.353)	−0.090 (0.581)	0.023 (0.553)

Note. n = 21 for each age group; data are mean beta values, with standard deviations in parentheses. MFG = middle frontal gyrus; FEF = frontal eye field; SPL = superior parietal lobule; IPS = intraparietal sulcus.