A constraint on eliminating semantic priming by repeating a prime

Repeated semantic primes have been shown to generate an additive semantic priming effect when those primes are different words, but repetition priming of the prime seems to eliminate semantic priming of lexical decisions for reasons that are not clear. These studies replicated this effect but also showed that repetition priming of the prime does not eliminate semantic priming with a longer lag between the repeated primes. The implications of these results for understanding the basic effect are discussed.