?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Criterios+para+determinar+la+calidad+de+los+estudios+primarios+en+el+contexto+de+una+SLR%3A+El+proceso+de+extracci%C3%B3n+en+un+estudio+terciario&rft.creator=Guardiola+Churiaque%2C+Alberto&rft.contributor=Gallardo+P%C3%A9rez%2C+Carolina&rft.contributor=P%C3%A9rez+Mart%C3%ADnez%2C+Jorge+Enrique&rft.subject=Computer+Science&rft.description=El+presente+trabajo+est%C3%A1+enmarcado+te%C3%B3ricamente+dentro+del+%C3%A1mbito+de+las+revisiones+sistem%C3%A1ticas+de+literatura%2C+concretamente+en+los+instrumentos+de+calidad+basados+en+listas+de+comprobaci%C3%B3n+usados+para+evaluar+la+calidad+de+estudios+primarios.+Pr%C3%A1cticamente%2C+se+encuentra+enmarcado+dentro+del+procesamiento+del+lenguaje+natural%2C+destacando+la+similitud+sem%C3%A1ntica+como+principal+herramienta.+Con+la+realizaci%C3%B3n+de+este+proyecto+se+pretende+obtener+un+modelo+cuya+entrada+sea+un+cuerpo+de+oraciones+y+como+salida+se+obtenga+un+conjunto+de+agrupaciones+de+las+oraciones+de+entrada+donde+cada+agrupaci%C3%B3n+comparte+una+%C3%BAnica+caracter%C3%ADstica+relacionada+con+la+evaluaci%C3%B3n+de+la+calidad.+Para+obtener+la+soluci%C3%B3n+deseada+se+ha+dividido+el+proceso+en+dos+partes%2C+una+parte+inicial+donde+se+trabaja+sobre+una+muestra+de+estudios+reducida+y+una+segunda+parte+donde+se+tienen+en+cuenta+todos+los+estudios.+Para+la+obtenci%C3%B3n+de+los+criterios+de+calidad+que+forman+las+checklist+de+estudios+secundarios+se+ha+realizado+un+proceso+de+extracci%C3%B3n+de+informaci%C3%B3n+manualmente.+Para+evitar+ruido+en+la+informaci%C3%B3n+se+realiza+un+filtrado+de+los+criterios+donde+se+eliminan+los+espec%C3%ADficos.+Para+la+creaci%C3%B3n+del+modelo+se+ha+tomado+un+enfoque+incremental.+Considerando+como+objetivo+la+agrupaci%C3%B3n+se+han+utilizado+t%C3%A9cnicas+de+procesamiento+de+lenguaje+natural.+Se+han+preprocesado+los+criterios+para+facilitar+el+an%C3%A1lisis+y+luego+se+han+vectorizado%2C+siguiendo+el+esquema+bolsa+de+palabras.+Una+vez+ya+est%C3%A1n+listos+para+analizar%2C+se+han+empleado+distintos+enfoques+y+se+ha+analizado+su+efectividad.+Para+medir+la+diferencia+entre+criterios+se+ha+utilizado+la+similitud+del+coseno.+Adem%C3%A1s%2C+se+ha+incluido+el+uso+de+TF-IDF+para+valorar+la+importancia+de+los+t%C3%A9rminos+en+el+cuerpo+general.+Para+el+agrupamiento+de+criterios+se+utiliza+la+sinonimia+de+las+palabras+mediante+WordNet%2C+aumentando+el+reconocimiento+de+similares+excluidos+anteriormente+por+utilizar+t%C3%A9rminos+distintos.+El+siguiente+enfoque+es+la+eliminaci%C3%B3n+de+los+t%C3%A9rminos+m%C3%A1s+frecuentes+para+eliminar+los+problemas+que+causan.+La+idea+de+utilizar+TF-IDF+es+la+de+restar+importancia+a+las+palabras+comunes+a+la+hora+de+calcular+distancias%2C+por+lo+que+se+combina+esta+t%C3%A9cnica+con+la+de+sinonimia.+Los+enfoques+que+resultan+m%C3%A1s+efectivos+son+aquellos+en+los+que+las+palabras+m%C3%A1s+usadas+se+eliminan+o+tienen+un+valor+bajo.+Una+vez+obtenidos+los+modelos%2C+se+procesan+todos+los+criterios+disponibles%2C+se+eval%C3%BAan+los+modelos%2C+mostrando+alta+precisi%C3%B3n%2C+y+se+estudian+los+resultados.+Los+criterios+m%C3%A1s+utilizados+son%3A+objetivos+del+estudio+definidos%2C+dise%C3%B1o+del+estudio+adecuado%2C+descripci%C3%B3n+del+contexto+de+la+investigaci%C3%B3n+y+resultados+escritos+entre+otros.+Tras+la+realizaci%C3%B3n+de+este+proyecto+se+espera+que+los+resultados+obtenidos+sean+de+utilidad+para+definir+una+lista+de+criterios+objetiva+y+as%C3%AD+poder+reducir+el+sesgo+de+los+investigadores+y+el+tiempo+que+se+utiliza+para+realizar+las+evaluaciones+de+calidad.%0D%0AAbstract%3A%0D%0AThis+project+is+theoretically+framed+within+the+field+of+Systematic+Literature+Reviews+(SLR)%2C+concretely+in+the+field+of+quality+instruments+based+on+checklists+used+to+evaluate+the+quality+of+primary+studies.+Practically%2C+it+is+framed+in+the+field+of+natural+language+processing+(NLP)%2C+standing+out+the+semantic+similarity+as+the+main+tool+to+be+used.+The+development+of+this+project+is+focused+in+obtaining+a+model%2C+with+a+corpus+of+sentences+as+the+data+input+and+clusters+of+sentences+as+the+output%2C+where+each+cluster+share+a+unique+characteristic+related+to+quality+assessment.+In+order+to+obtain+the+desired+solution%2C+the+process+has+been+split+in+two+parts%2C+an+initial+part+where+work+is+carried+out+on+a+small+sample+of+studies+and+a+second+part+where+all+the+studies+are+considered.+To+get+the+quality+criteria+that+constitute+the+primary+studies%E2%80%99+checklists+a+data+extraction+process+has+been+carried+out+manually.+To+avoid+noise+in+the+data%2C+a+filtering+process+has+been+done%2C+removing+the+specific+criteria.+For+the+purpose+of+creating+the+model%2C+an+incremental+approach+has+been+taken.+Considering+the+clustering+as+the+objective%2C+NLP+techniques+have+been+used.+The+criteria+have+been+pre-processed+to+simplify+the+analysis.+After+it%2C+they+have+been+vectorized+following+the+Bag+of+Words+(BoW)+scheme.+Once+they+are+ready+to+analyse%2C+different+approaches+have+been+used+and+their+effectiveness+has+been+analysed.+To+measure+the+contrast+between+criteria%2C+the+cosine+similarity+measure+has+been+used.+In+addition%2C+the+ideas+of+TF-IDF+have+been+included+to+assess+the+significance+of+the+words+in+the+general+corpus.+For+criteria+groups+to+be+formed%2C+the+synonymy+of+the+words+has+been+employed+through+WordNet%2C+increasing+the+recognition+of+similar+criteria+that+had+been+previously+excluded+due+to+the+use+of+different+terms+to+express+the+same+meaning.+The+next+approach+is+the+removal+of+the+most+frequent+words+to+avoid+the+problems+that+they+caused.+The+idea+of+using+TF-IDF+is+to+moderate+the+impact+common+words+have+in+the+similarity+value+when+calculating+distances.+This+technique+has+also+been+combined+with+synonymy+approach+previously+done.+The+most+effective+approaches+are+those+in+which+the+frequent+words+are+removed+or+are+lowly+valued.+Once+the+models+had+been+obtained%2C+all+the+available+quality+assessment+questions+were+processed%2C+the+models+were+evaluated%2C+showing+high+precision%2C+and+the+results+have+studied+and+explained.+The+most+used+criteria+are%3A+aims+of+the+study+defined%2C+adequate+study+design%2C+description+of+the+research+context+and+findings+clearly+stated%2C+among+others.+After+completing+this+project%2C+the+results+obtained+are+expected+to+be+useful+when+defining+a+list+of+objective+criteria+and+thus+be+able+to+reduce+the+bias+of+the+researchers+and+the+time+used+to+carry+out+quality+assessments.&rft.publisher=E.T.S.I+de+Sistemas+Inform%C3%83%C2%A1ticos+(UPM)&rft.rights=https%3A%2F%2Fcreativecommons.org%2Flicenses%2Fby-nc-nd%2F3.0%2Fes%2F&rft.date=2022-07&rft.type=info%3Aeu-repo%2Fsemantics%2FbachelorThesis&rft.type=Final+Project&rft.type=PeerReviewed&rft.format=application%2Fpdf&rft.language=spa&rft.format=application%2Fzip&rft.language=spa&rft.rights=info%3Aeu-repo%2Fsemantics%2FrestrictedAccess&rft.identifier=https%3A%2F%2Foa.upm.es%2F71343%2F