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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

不同管教方式之父母比較行為對子女能力影響之研究 / The impact of parental comparison from different parenting styles on children's general ability

王正婷 Unknown Date (has links)
本研究以TEPS資料庫第二、三波追蹤樣本為資料來源,使用多元迴歸分析中的OLS(ordinal least squares)最小平方法,分析不同管教方式之父母比較行為如何影響子女之綜合能力。刪除作答不全的缺失值後,共計取得有效樣本為2,595人。 研究結果顯示:父母管教方式若以雙向度作為分類,以高反應(74.6%)與高要求(69.2%)者居多,綜合兩大面向後,有52.40%的父母採取開明權威型的管教方式,有22.20%的父母為專制權威型,有16.90%的父母為寬鬆放任型,有8.50%的父母是忽視冷漠型。此外,父母最常把子女與其同班同學(45.5%)進行比較,其次依序為鄰居小孩、同事或朋友小孩(42.0%)、同年齡的親戚(37.0%)、兄弟姊妹(26.9%),父母最少拿自己小時候(18.8%)與子女相比。 經由多元迴歸分析之後得知,無論是開明權威、專制權威、寬鬆放任或忽視冷漠型的父母,凡拿子女與其「同班同學」比較者,子女的綜合能力越高,達到統計顯著水準;但是當父母持專制權威的管教方式時,無論有無加入控制變項(子女性別、父母教育程度和家庭月收入),有與「同班同學」和「父母小時候」比較者,其綜合能力顯著越高,但與「同年齡親戚」比較者,其綜合能力顯著越低。 / The research was to explore the effects of parenting style, parental comparison, and the interaction of them on children’s general ability. Data were collected from Taiwan Education Panel Survey (TEPS), the core panel in the second and the third wave. Total number of the students from high school reduced to 2,595 people after listwise deletion. We explored the effects by using ordinal least squares in the multiple regression analysis. The results showed that there were 74.6% high-respective parents, and 69.2% high-demanding ones. Mixed with the two dimensions, demanding and responsive, there were 52.40% authoritative parents, 22.20% authoritarian ones, 16.90% indulgent ones, and 8.50% neglectful ones. Besides, parents compared their children with their classmates (45.5%), neighbors (42.0%), cousins (37.0%), siblings (26.9%), and parents’ childhood (18.8%). After regression, the results showed in the following ways. First, no matter what the parenting style was, children who were compared with classmates had significantly higher ability. Whether adding the control variables like children’ gender, parents’ education level and family monthly income or not, when parents were authoritarian, children compared with classmates and parents’ childhood had significantly higher ability. Meanwhile, if they were compared with cousins, then they had significantly lower ability. Keywords: Taiwan Education Panel Survey (TEPS), multiple regression analysis, parenting style, social comparison, general ability
2

Dialelo parcial e associação entre caracteres de rendimento em híbridos de milho / Partial diallel association between characters and yield of maize hybrids

Baretta, Diego 29 October 2013 (has links)
Submitted by Gabriela Lopes (gmachadolopesufpel@gmail.com) on 2016-10-03T17:58:28Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Dissertação Diego Baretta oficial.pdf: 4294007 bytes, checksum: af5d209b7d453630ed4e62113be77952 (MD5) / Approved for entry into archive by Aline Batista (alinehb.ufpel@gmail.com) on 2016-10-11T19:59:16Z (GMT) No. of bitstreams: 2 Dissertação Diego Baretta oficial.pdf: 4294007 bytes, checksum: af5d209b7d453630ed4e62113be77952 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Made available in DSpace on 2016-10-11T19:59:16Z (GMT). No. of bitstreams: 2 Dissertação Diego Baretta oficial.pdf: 4294007 bytes, checksum: af5d209b7d453630ed4e62113be77952 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2013-10-29 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / No melhoramento de milho (Zea mays L.) a utilização de cruzamentos dialélicos visando combinações híbridas promissoras é prática comum, assim como o conhecimento da inter-relação entre rendimento de grãos e seus componentes, visando uma maior eficiência nos programas de melhoramento. Desta forma o objetivo deste trabalho foi estimar a capacidade geral (CGC) e específica (CEC) de combinação, utilizando o esquema de dialelo parcial entre linhagens endogâmicas de milho, assim como estimar os coeficientes de correlações fenotípicas entre caracteres de rendimento em milho e o desdobramento em efeitos diretos e indiretos pela análise de trilha. As combinações híbridas oriundas dos dois grupos heteróticos foram avaliadas em cinco ambientes de cultivo, utilizando -se delineamento de blocos casualizados. Avaliaram-se os caracteres: altura de plantas (AP), altura de inserção de espiga (AE), rendimento de grãos de parcela (RG), diâmetro de espiga (DE) e comprimento de espiga (CE). Realizou-se a análise dialélica, seguindo o método IV, modelo I adaptado para dialelos parciais para múltiplos ambientes. Detectaram-se diferenças significativas para cruzamentos entre todos os caracteres. O ambiente revelou significância entre todos os caracteres, com exceção de DE. A interação cruzamento e ambiente foi significativa para os caracteres AP e RG. As CGC's e CEC's foram significativas para todos os caracteres, revelando importância dos efeitos aditivos (CGC) e não-aditivos (CEC) na expressão dos caracteres, revelando predominância dos efeitos não-aditivos da CEC. Os genitores que apresentaram elevados valores de CGC foram 14 e 8 (grupo I) e 6' e 7' (grupo II) para os caracteres AE e AP, assim como dos genitores 15 e 4 (grupo I) e 3' e 4' (grupo II) para os caracteres RG, DE e CE. As combinações híbridas 10x4', 2x4', 12x4', 11x4', 10x3', 7x3', 9x3', 8x3', 14x3' e 15x7' se destacaram-se para os caracteres AE e AP apresentando elevadas magnitudes de CEC. Para os caracteres RG, DE e CE evidenciou-se elevados valores de CEC entre as combinações 3x1', 4x7', 1x1', 4x6', 15x2', 15x5' e 15x8'. Para as estimativas de correlação e análise de trilha foram mensurados caracteres primários e secundários envolvidos nos componentes do rendimento de grãos em milho em cinco locais distintos. Os resultados indicaram que rendimento de grãos de parcela apresentou estimativas positivas e significativas entre os caracteres diâmetro da espiga, peso de espiga, peso de grãos e massa de cem grãos nos ambientes classificados como desfavoráveis. Da mesma forma, evidenciou-se associação significativa e positiva com prolificidade de plantas e rendimento de grãos de parcela em todos os locais analisados, e revelou elevado efeito direto positivo, indicando ser um caráter promissor via seleção indireta visando ganho genético para o rendimento de grãos na cultura. / For maize (Zea mays L.) using diallel hybrids order promising is common practice, as well as knowledge of the inter-relationship between grain yield and its components in order to achieve greater efficiency in breeding programs. Thus the aim of this study was to estimate the general (CGC) and specific (CEC), using the scheme of partial diallel among maize inbred lines as well as estimate the coefficients of correlations between traits in maize yield and unfolding direct and indirect effects in path analysis. The hybrid combinations stemming from two heterotic groups were assessed in five cultivation environments, using a randomized block design. Characters were evaluated: plant height (AP), ear insertion height (AE), grain yield plot (RG), ear diameter (DE) and ear length (CE). The intersection and environment interaction was significant for the characters AP and RG. The CGC's and CEC's were significant for all the characters, revealing the importance of additive (CGC) and non -additive (CEC) in the expression of the characters, noting the predominance of non -additive effects of CEC. The parents who had high values were CGC 14 and 8 (group I) and 6 'and 7' (group II) for AE and AP chara cters, as well as parents of 15 and 4 (group I) and 3 'and 4' (group II) for the characters RG, DE and CE. The hybrid combinations 10x4 ', 2x4' 12x4 ', 11x4', 10x3 ', 7x3', 9x3 ', 8x3' 14x3 'and 15x7' can be up to the characters AE and AP presenting high magnitudes of CEC. For characters RG, DE and CE showed up high CEC values between combinations 3x1', 4x7', 1x1', 4x6', 15x2', 15x5' and 15x8'. For the correlation coefficients and path analysis were measured characters involved in primary and secondary components of grain yield in maize in five different locations. The results indicated that grain yield plot showed positive and significant estimates between characters ear diameter, ear weight, grain weight and weight of hundred grains in environments classified as unfavorable. Likewise, there was a significant positive association with prolificacy of plants and grain yield of the plot at all sites analyzed, and showed high positive direct effect and could be a promising character through indirect selection targeting genetic gain for grain yield in culture.

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