In the complex study of Bannard (2009), the analysts separated the overall experiments by transcripts of the last two chronicle sessions for children at 2 years old and one session for the children at 3 years old. Their point was to get grammar of the form portrayed from a specimen of a child’s speech and after that test how well it could be represented in the child’s later articulations. The analysts moved toward this issue of grammars and statistical inference particularly in an assortment of probabilistic context-free grammar (PCFG). They alluded to them as use based PCFGs (or UB-PCFGs). Referencing to the Bayesian modeling, a sort of statistical model that represents to an arrangement of arbitrary factors and their restrictive conditions by means of a coordinated directed acyclic graph (DAG), the analysts touched base at a likelihood appropriation over conceivable models from which they at that point tested plausible grammars. Their inspecting methodology gave 1,000 grammars for the 2-year-old information and 500 grammars for the 3-year-old data. These examples mirrored the scope of grammar uses that are conceivable from the data. In the first experiment, the researchers tried how well UB-PCFGs can represent the individual test utterances of every child at age 2 and 3. They tried the review of the punctuations and how well they could anticipate the children’s utterances, which they evaluated by utilizing the information-theoretic measure of perplexity. They contrasted this and the perplexity of completely conceptual PCFG models procured from similar information. They utilized their UB-PCFGs to measure the efficiency of the children by taking a look at the unpredictability of the examinations proposed. In the second experiment, the scientists took each example of UB-PCFGs for every child at each age and parsed the test expressions for that child at the other age and the other child at the two ages. They played out all pairwise cross-overs, inducing 12 sets of parses. In experiment three, the researchers performed arrangements over selected parts of speech. They at that point extracted candidate rules in which the word forms were replaced by the proper part of speech. Categories were found amid the past extraction process, yet they happened just as slots and subsequently signs would never be completely conceptual. The key distinction in this trial is that the specialists’ punctuations can have rewrite rules in which the correct side of the production incorporates just unique data: construed categories and/or the expert annotated categories. They performed two such deduction techniques for every child at each age, first embeddings noun and proper noun categories and afterward including verbs. The inspecting methodology was the same as experiment one, engendering 1,000 grammars for the 2-year-old data and 500 grammars for the 3-year-old data. They at that point utilized these grammars to parse test expressions in which the important parts of speech had additionally been substituted.