The term differential psychology is identified in base64 scheme by the sequence ZGlmZmVyZW50aWFsIHBzeWNob2xvZ3k=, while the MD5 signature is equal to a7536478b7f3253d13b491a18681295f. The ASCII encoding of differential psychology in hexadecimal notation is 646966666572656e7469616c2070737963686f6c6f6779.