Mitchell's thinking was that in rssttt there was the nice alphabetical progression, so people might go "obviously rssuuu then" whereas with mrrjjj there isn't really a pattern with the letters, so people will have to search harder for the idea, and might eventually settle on mrrjjjj. However, we only got one mrrjjjj - and an mrrnnnn - so that thought didn't really carry over to my convenience sample.

I found abc -> abd, mrrjjj -> ? the most interesting case, and was determined to find a sensible pattern in it. My answer of mrrnnnn was motivated by the pattern I decided upon: here, abc is paralleled by mrrjjj in the sense that each is composed of three members of a series: (a)(b)(c) and (m)(rr)(jjj). In abc one adjusts the initial member a to form each later member by [1] incrementing the alphabetic position by +1, +2, +3 etc. and [2] incrementing the number of letters composing the member by 0. In mrrjjj one adjusts the initial member m to form each later member by [1] incrementing the alphabetic position by +5, -3, +1 etc. and [2] incrementing the number of letters composing the member by +1, +2, +3 etc. The transformation abc -> abd means advancing the third member by one place in the series, and so I applied the same transformation to mrrjjj: the fourth member would increment m by +1 alphabetically and increment the number of identical letters composing it by +3, therefore mrrnnnn. (I followed a similar rationale for the simpler abc -> abd, rssttt -> ?, and in that case my answer was shared by two others.)

Mitchell's thinking was that in rssttt there was the nice alphabetical progression, so people might go "obviously rssuuu then" whereas with mrrjjj there isn't really a pattern with the letters, so people will have to search harder for the idea, and might eventually settle on mrrjjjj. However, we only got one mrrjjjj - and an mrrnnnn - so that thought didn't really carry over to my convenience sample.I found abc -> abd, mrrjjj -> ? the most interesting case, and was determined to find a sensible pattern in it. My answer of mrrnnnn was motivated by the pattern I decided upon: here, abc is paralleled by mrrjjj in the sense that each is composed of three members of a series: (a)(b)(c) and (m)(rr)(jjj). In

abcone adjusts the initial memberato form each later member by [1] incrementing the alphabetic position by +1, +2, +3 etc. and [2] incrementing the number of letters composing the member by 0. Inmrrjjjone adjusts the initial membermto form each later member by [1] incrementing the alphabetic position by +5, -3, +1 etc. and [2] incrementing the number of letters composing the member by +1, +2, +3 etc. The transformation abc -> abd means advancing the third member by one place in the series, and so I applied the same transformation to mrrjjj: the fourth member would incrementmby +1 alphabetically and increment the number of identical letters composing it by +3, therefore mrrnnnn. (I followed a similar rationale for the simpler abc -> abd, rssttt -> ?, and in that case my answer was shared by two others.)