; or (iv) a non-governmental organization that has experience working with transition-age foster youth. (C) Moderate evidence of effectiveness The term moderate evidence of effectiveness means that the results of at least 1 well-designed and well-implemented quasi-experimental study of a program demonstrates a statistically significant, sizable, and sustained effect on improving 1 or more adulthood outcomes for transition-age foster youth and the overall weight of the evidence shows meaningful benefits for program participants. (D) Preliminary evidence of effectiveness The term preliminary evidence of effectiveness means that prior studies of a program, key components of a program, or similar programs suggest potential for sizable, and sustained effects on improving adulthood outcomes for transition-age foster youth but the overall weight of the evidence does not yet constitute moderate or strong causal evidence of such effects. (E) Strong evidence of effectiveness The term strong evidence of effectiveness means that the results of at least 1 well-designed and well-implemented experimental study of a program demonstrates a statistically significant, sizable, and sustained effect on improving 1 or more adulthood outcomes for transition-age foster youth and the overall weight of the evidence shows meaningful benefits for program participants. (F) Transition-age foster youth The term transition-age foster youth means individuals who have experienced foster care at age 14 or older. (3) Innovation grants (A) Authority to award grants The Secretary shall award the following types of innovation grants to eligible entities to improve adulthood outcomes for transition-age foster youth through the development, validation, and dissemination of evidence-based effective programs for improving adulthood outcomes for transition-age foster youth: (i) Development grants Development grants to carry out programs with preliminary evidence of effectiveness in improving adulthood outcomes for transition-age foster youth. (ii)