Table 4.

n-back-2 performance.

	Mean	SD	P	N
n-back-2/Own classic cigarettes	60.24	18.656	NS	34
n-back-2/Second generation, disposable cigalike electronic cigarette loaded with cartridges with 24 mg nicotine	62.03	18.252	NS	34
n-back-2/First generation rechargeable cigalike, e-cigarettes, loaded with cartridges 24 mg nicotine	53.76	21.079	NS	34
n-back-2/Second generation disposable cigalike electronic cigarette loaded with cartridges with 0 mg nicotine, mint aroma	51.29	20.877	NS	34
n-back-2/Personal vaporizer, model Ego C (tank cartomizer), loaded with liquid nicotine 24 mg, tobacco aroma	54.32	21.087	NS	34