Question: Which psychologist was involved in the creation of a children's television series featuring an animated blu-spotted dog named Blue?

<P0-S0> Blue's Clues is an American live-action/animated children's television series that premiered on Nickelodeon on Sunday, September 8, 1996. <P0-S1>  Producers Angela Santomero, Todd Kessler, and Traci Paige Johnson combined concepts from child development and early-childhood education with innovative animation and production techniques that helped their viewers learn. <P0-S2>  It was hosted originally by Steve Burns, who left in 2002 and was replaced by Donovan Patton. <P0-S3>  The show follows an animated blue-spotted dog named Blue as she leaves a treasure hunt for the host and the viewers. <P0-S4>  "Blue's Clues" became the highest-rated show for preschoolers on American commercial television and was critical to Nickelodeon's growth. <P0-S5>  It has been called "one of the most successful, critically acclaimed, and ground-breaking preschool television series of all time." <P0-S6>  A spin-off called "Blue's Room" premiered in 2004. <SEP> <P1-S0> The Blue Peter pets are animals that regularly appear on the long-running BBC children's television series "Blue Peter". <P1-S1>  For 27 years, when not on TV, these pets were often looked after by "Blue Peter"'s long-standing pet keeper Edith Menezes, who died in 1994. <P1-S2>  The first pet was a dog named Petra in 1962, and since then there have been several dogs, cats, tortoises, and parrots, and horses Joe And Simon. <P1-S3>  The current animals on the show are Shelley the tortoise and Iggy the trainee guide dog puppy. <P1-S4>  Rags, a pony, named by viewers, was purchased with the proceeds of a Christmas appeal in the late 1970s as a Riding for the Disabled horse. <P1-S5>  The Blue Peter parrot—Joey, and one successor, Barney—featured in the 1960s, but when Barney, a blue-fronted amazon, died, he was not replaced. <P1-S6>  In a 1986 documentary shown on BBC2 as part of the Did You See...? <P1-S7>  series, former presenter Peter Purves recalled that Biddy Baxter, the show's editor, had called him in floods of tears the day the first parrot Joey died. <P1-S8>  He went on to muse in the same interview that had he himself died, Baxter would have been far less upset. <P1-S9>  The original ideas behind featuring the programme's pets were to teach viewers who had animals of their own how to look after them, and for the creatures to act as surrogate pets for those that did not own any. <P1-S10>  For example, dog training items, tortoise hibernation, and cat care are often featured on the programme; however, the keeping of rabbits and mice was deemed not suitable as they do not live long. <P1-S11>  In addition, dogs that lived with the presenters often accompanied them on filming assignments. <SEP> <P2-S0> Poochini's Yard (a.k.a. Poochini) is an animated children's television series which originally aired globally in 2000, but was not shown in the United States for the first time until September 1, 2002. <P2-S1>  The series follows the life of a dog named Poochini who runs away from home after his rich owner dies, gets captured by the dog pound and is adopted by an average American family. <SEP> <P3-S0> Daniel R. Anderson (born 1944) is an American psychologist and a professor emeritus at the University of Massachusetts Amherst. <P3-S1>  Anderson specializes in developmental psychology and was involved in the creation of children's television series including "Allegra's Window", "Gullah Gullah Island", "Bear in the Big Blue House", "Blue's Clues", and "Dora the Explorer". <P3-S2>  He has also acted as an advisor to "Captain Kangaroo", "The Wubbulous World of Dr. Seuss", "Sesame Street", "Fimbles", "Go, Diego, Go! <P3-S3> ", "It's a Big Big World", "Peep and the Big Wide World" and "The WotWots".